Thursday

July 31, 2014

July 31, 2014

Number of results: 1,022

**Stats**

If there are only two possible outcomes to an experiment then... A.) the two corresponding probabilities must each be.50. B.) the two corresponding probabilities could be any numbers between 0 and 1, but must add up to 1. C.) the two corresponding probabilities could each be ...
*November 2, 2011 by Mandy*

**stats**

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of that survey.) The ...
*October 2, 2010 by jaz*

**Stats**

It is known that the amount of time needed to change the oil in a car is normally distributed with a standard deviation of 5 minutes. A random sample of 100 oil changes yielded a sample mean of 22 minutes. Compute the 99% confidence interval estimate of the mean of the ...
*February 26, 2007 by Jason L*

**Stats**

You are allowed to choose four whole numbers from 1 to 10 (including 1 and 10). You can only choose each number once though. Which of the following statements is FALSE? A. The numbers 4, 5, 6, and 7 have the smallest possible standard deviation. B. The numbers 1, 2, 3, and 4 ...
*January 20, 2012 by Nikki*

**Stats**

Observations are taken on sales of a certain mountain bike in 30 sporting goods stores. The regression model was Y = total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors’ advertising expenditures (thousands of dollars), X3 = advertised...
*September 30, 2010 by Mat*

**Stats**

A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random sample of 120 ...
*November 17, 2013 by Emile*

**stats**

Suppose we have a population of scores with a mean (μ) of 200 and a standard deviation (σ) of 10. Assume that the distribution is normal. Provide answers to the following questions: What score would cut off the top 5 percent of scores? What score would cut off the ...
*October 30, 2011 by lori*

**Elasticity**

Hi guys, could you please help me with this question; What reason would firms wish to have knowledge in regards to the income elasticity of demand for its products??? Is it because it allows them to see what happens to their total revenue as price changes????? Since this is ...
*September 28, 2006 by Sarah*

**stats**

You are determining the period of oscillation of a pendulum. One procedure would be to measure the time for 20 oscillations, t20, and repeat the measurement 5 times. Another procedure would be to measure the time for 5 oscillations, t5, and repeat the measurement 20 times. ...
*October 19, 2008 by Sam*

**stats**

An analysis is done to determine the amount spent on fresh fruits and vegetables per person per week. In a certain area, assume this amount is normally distributed with a mean of $13.9 and a standard deviation of $ 4.91. A. When finding the probability that a random person ...
*October 10, 2010 by ff*

**Stats**

In a study that was highly published doctors discovered that aspirin helps prevent heart attacks. The research project which was scheduled to last 5 years employed 22,000 american physicians (all male). Half took an aspirin tablet 3 times a week while the other half took a ...
*February 27, 2007 by kristen*

**Stats **

Directions: Suppose you have a standard deck 52 cards (4 suits: hearts, diamonds, clubs, and spades each suit has 13 cards (1/4 of the deck) and those 13 cards include one ace,and numbers 2 through 10 and 3 face cards: a jack a queen and king) suppose you pick a card at ...
*March 10, 2013 by Sarah*

**stats**

Nicotine (mg) Filtered Kings Nonfiltered Kings n1 = 21 n2 = 8 sample mean = 0.94 sample mean = 1.65 s = 0.31 s = 0.16 Suppose you were to conduct a test (at the 0.05 significance level) to test the claim that king-size cigarettes with filters have a lower mean amount of ...
*August 12, 2008 by nick*

**stats**

The probability that an individual has hearing loss is .40. The probability that an individual has poor eyesight is .55. If hearing loss and poor eyesight are INDEPENDENT events, what is the probability of a person with hearing loss and poor eyesight?
*November 17, 2013 by lono*

**bus stats**

A manufacturing company has 5 identical machines that produce nails. The probability that a machine will break down on any given day is .1. Define a random variable X to be the number of machines that will break down in a day. a. what is the appropriate probability ...
*March 25, 2011 by Mich Mich*

**Stats**

In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who try to quit with ...
*November 26, 2012 by Shannon*

**Stats**

G. Johnson recently inherited a large sum o money; he wants to use a portion of this money to set up a trust fund for his two children. The trust fund has two investment options: 1) a bond fund and 2) a stock fund. The projected returns over the life of the investments are 6% ...
*July 10, 2008 by Judy*

**Stats**

A statistical test is performed, and its P-value turns out to be about 3%. Which of the following must be true? Pick all that are correct. a) The null hypothesis is true. b)There is about a 3% chance that the null hypothesis is true. c) The alternative hypothesis is true. d) ...
*August 3, 2013 by Helen*

**stats**

use dependent samples t test. Set hypothesis so what formula will I use to solve Five people who were convicted of speeding were ordered by the court to attend a workshop. A special device put into their cars kept records of their speeds for two weeks before and after the ...
*March 13, 2013 by Anonymous*

**stats**

You are a share analyst for an investment firm and are investigating the return on shares in the Eastern Mining Corporation over the last four years. The return on Eastern Mining Corporation shares over the last four years is presented. Calculate the geometric mean rate of ...
*October 1, 2010 by Answer Me*

**Stats - Post Hoc Analysis**

This is a question I am working on. i have successfully figured out part A and am having trouble with part B. (My work for Part B is shown below) ______________________________________ Two new therapies designed to increase levels of self-esteem are tested in a clinical ...
*June 17, 2006 by VC15*

**AP Stats**

Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both classes follow a normal...
*January 9, 2009 by Peter*

**college stats**

A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate statistic? What is the...
*October 8, 2012 by brittany *

**stats**

It was thought that students who dressed more neatly received better grades. To test this idea, a researcher rated each student on neatness of dress and obtained their grades on a standard school achievement test. The data are presented below. Higher scores indicate higher ...
*May 8, 2013 by Anonymous*

**Stats**

A few years ago, researchers investigated how many clubs students were involved in at a small liberal arts college in the Northeast. The results of their interviews of 92 students are tabulated below: number of clubs students 0 18 1 12 2 15 3 16 4 17 5 9 6 3 7 0 8 0 9 2 a. ...
*September 22, 2009 by CM*

**Prob and Stats**

To estimate the mean height population of male students on your campus, you will measure and SRS of students. Heights of people the same sex and similiar ages are close to normal. You know from government data that the standard deviation of the heights of young men is about 2....
*October 12, 2010 by Susan*

**Stats**

When asked about their driving, 56% of students say they are better than the average driver, 39% say they are an ave. driver and the rest say they are worse than ave. A pair of students are driving home together for break. What is the probability that at least one student said...
*October 14, 2009 by CM*

**STATS**

In a certain store, there is a .05 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 820 items. a) What is the expected number of mismatches and standard deviation? (Round your expected number of mismatches to 1 ...
*October 30, 2010 by Helen*

**stats**

a student randomly guesses at five multiple-choice questions, each question has five possible choices (suppose the choice for each question is independent): a) Find the probability that the student gets exactly three correct. b) What is the probability that the student gets ...
*March 31, 2012 by jeanette*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the ...
*February 5, 2009 by kate*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the ...
*February 5, 2009 by kate*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the ...
*February 6, 2009 by peter*

**stats**

Identify the direction and all possible interpretations of each of the following correlations. Be sure to identify each example as positive, negative, or zero (not correlated). Then give all possible causal interpretations for the results. Many students in Professor Handel’s ...
*April 28, 2013 by Anonymous*

**STATS**

Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a researcher measures the ...
*February 20, 2014 by Tracy *

**Stats**

Rising prescription drug prices caused the U.S. Congress to consider laws that would force pharmaceutical companies to offer prescription discounts to senior citizens without drug benefits. The House Government Reform Committee provided data on the prescription cost of some of...
*November 25, 2009 by Desire*

**Stats**

3. A mail order magazine service has the exclusive subscription rights to a certain magazine. Subscriptions can be reserved for one, three, four or five years. A study of the subscriber list for other similar magazines reveals that the following information regarding the ...
*March 10, 2014 by Cel*

**Stats**

Question 3 Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for loans; that is, bonds perform well when lending rates are down and perform poorly when interest rates are up. Can the bond rate be predicted by the ...
*August 20, 2012 by David*

**College Stats**

An urn contains 4 green, 6 blue and 10 yellow chips. You pay $5 to draw a chip from the urn. Here are the rules of the game: if you draw a green chip, the dealer returns you your bet and gives you an additional $5. if you draw a blue chip, the dealer returns you your bet and ...
*March 7, 2010 by Mary*

**stats math**

Popular wisdom is that eating pre-sweetened cereal tends to increase the number of dental caries (cavities) in children. A sample of children was (with parental consent) entered into a study and followed for several years. Each child was classified as a sweetened-cereal lover ...
*June 12, 2011 by Thara*

**Finance**

I need help on this study problem.----- A firm computes the probability distribution of possible net present values for a project and finds that it has an expected value of $125,000 and a standard deviation of $75,000. Assuming that the distribution of net present value is ...
*November 2, 2006 by Jenny*

**stats**

Suppose a shipment of 500 machine parts contains 62 defective and 438 non-defective machine parts. From the shipment you take a random sample of 25. You are interested in the number of defective machine parts out of 25 trials and corresponding probabilities. When sampling with...
*October 21, 2012 by laura*

**stats**

An ice cream vendor sells three flavors: chocolate, strawberry, and vanilla. Forty five percent of the sales are chocolate, while 30% are strawberry, with the rest vanilla flavored. Sales are by the cone or the cup. The percentages of cones sales for chocolate, strawberry, and...
*March 10, 2013 by cate*

**Math/Stats**

In the last senatorial election in New Jersey, the republican candidate got 48% of the vote. During the election an exit poll was conducted by radio station WSTAT. Ten voters selected at random where asked if they voted for the republican candidate. (a) Let X = "Number of ...
*November 9, 2008 by Xavier*

**stats please help test tom**

When a computerized generator is used to generate random digits, the proability that any particular digit in the set {0,1,2, . . .,9} is generated on any individual trial is 1/10-0.1. suppose that we are generating digits one at a time and are interested in tracking ...
*January 24, 2007 by david*

**stats **

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30. To perform ...
*June 14, 2011 by jenny*

**Stats**

4. A least squares regression line to predict a student’s Stat145 test score (from 0-to-100) from the number of hours studied was determined from a class of 55 Stat145 students: ̂ = 48.2 + 2.21x. One student in the class studied for 18 hours and scored 82 on the exam. (a...
*March 7, 2014 by Tracy *

**mba stats class, help!!**

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30. To perform ...
*June 15, 2011 by jenny*

**Stats- need someone to check **

Doing this assignment and was wondering if i got the right answers According to the Census Bureau publication Current Population Reports, the probability distribution for household size (number of people per household, say X) in the United States is as follows. For the ...
*February 7, 2011 by Ryan*

**stats**

Opisthotrochopodus n sp. is a polychaete worm that inhabits deep sea hydrothermal vents along the Mid-Atlantic Ridge. According to an article by Van Dover et al. in Marine Ecology Progress Series (1999, vol 181 pp 201-214), the lengths of female polychaete worms are normally ...
*March 14, 2013 by Anonymous*

**bio stats**

After a winter ice storm, 25 parrots are found sheltering in a tool shed. Ana traps the parrots, weighs them (average weight = 36 grams) and then feeds them. The next morning she find that 6 of the parrots have died. She weighs the dead ones (average weight = 20 grams) and the...
*April 26, 2009 by Frank Minimi*

**Statistics**

I bemieve the t test is paired , want to make usre beofre I run the stats. A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether or not they own computers? The researcher surveyed 92 undergraduate education ...
*June 24, 2012 by Help Please*

**stats**

A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least 26 miles per gallon. To see if the goal is being met they check the gasoline usage for 50 company trips chosen at random, finding a mean of 25.02 mpg...
*July 13, 2011 by GLEN*

**math**

What is outliers? how do you solve this problem? please give me some answers. In statistics outliers are data points that very far from the mean. There are some rules of thumb for determining them, but I don't recall them right off hand and don't want to reach for the text ...
*September 6, 2006 by Brittney*

**STATS**

The probability of a manufacturing defect in an aluminum beverage can is .00003. If 100,100 cans are produced, (a) Find the approximate probability of at least two defective cans. (Round your answer to 4 decimal places.) (b) Find the approximate probability of at least three ...
*October 30, 2010 by Helen*

**Stats**

Suppose that you find out that 20% of all babies say their first word by the time they are 13 months old, and that 90% of all babies say their first word by the time they are 22 months old. Assume that the age at which a baby says its first word is normally distributed. Find ...
*September 27, 2009 by CM*

**statistics**

Question 1 Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a seven-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasing revenue for ...
*November 18, 2012 by Anonymous*

**AP Stats**

Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses were placed on a ...
*November 12, 2013 by Sarah*

**college stats**

Sorry for all the questions, I really need help and an explanation so I can fully understand. I really appreciate everything. Thank you. In a random sample of 519 judges, it was found that 285 had an introvert personality type. Construct a 95% confidence interval for the ...
*July 12, 2013 by penelope*

**Stats**

EC= eye color RFL= ring finger longer RFNL= ring finger not longer EC RFL RFNL Total Blue 20 17 37 Brown 27 22 49 Green 15 7 22 Other 12 5 17 Total 74 51 125 D) What is the probability that the student selected has green eyes and a ring finger longer than his/her index finger...
*October 25, 2009 by CM*

**Stats**

5. The board of directors for Procter and Gamble is concerned that only 19.5% of the people who use toothpaste buy Crest toothpaste. A marketing director suggests that the company invest in a new marketing campaign which will include advertisements and new labeling for the ...
*October 31, 2007 by LT*

**stats 2**

3. Piyush, who had joined the infrastructure department of the bank, was asked to estimate the rental value of commercial property at Ranchi, for the purpose of identifying suitable premises for locating a new branch. Piyush assessed the standard deviation of the value of the ...
*March 29, 2011 by prakash*

**stats 3**

2. Collect the data pertaining to the number of customers serviced (by you or by one of the branch employees) and the number of leads generated through them during any 10 consecutive working days in February 2010. The data has to be tabulated as under. The following table ...
*March 29, 2011 by prakash*

**Stats**

Which of the following statement is true? In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha. A 95% ...
*November 18, 2013 by Jenn*

**College stats **

Please help, I would appreciate an explanation on how you got the answer so I can understand it, being that I am so confused. The Denver Post stated that 80% of all new products introduced in grocery stores fail (are taken off the market) within 2 years. A grocery store chain ...
*July 12, 2013 by penelope*

**ap stats**

two different sections of electricians took their state license test. the first section consisted of 75 applicants having an average score of 262 and a sample standard deviation of 35. they were journeyman, experienced electricians who were renewing their licenses. the second ...
*May 13, 2014 by emma*

**Stats**

I ran this an an independent samples t-test. It is a t rest according to the professor, just want to make sure I have the right one. A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether or not they own ...
*July 14, 2012 by Help Please*

**MATH STATS URGENT**

The Houston Rockets and San Antonio Spurs will play a "best two out of three" series. Assume that Houston has a probability of 1/3 of winning any game. a. Draw a probability tree showing possible outcomes of the series. Label the branches with appropriate probabilities. b. ...
*April 24, 2014 by Lisa*

**MATH STATS URGENT**

The Houston Rockets and San Antonio Spurs will play a "best two out of three" series. Assume that Houston has a probability of 1/3 of winning any game. a. Draw a probability tree showing possible outcomes of the series. Label the branches with appropriate probabilities. b. ...
*April 25, 2014 by Lisa*

**Stats**

Sooo I'm a little confused on these 2 questions: 1. Sample: a. method of collecting, presenting, and describing sample data b. a numerical value summarizing all the data of an entire population c. a collection, or set, of individuals, objects, or event whose properties are to ...
*June 11, 2013 by mysterychicken*

**Stats**

[1.5%] TWO SAMPLE HYPOTHESIS TEST FOR PROPORTION: Before starting his campaign for mayor, Mr. Emory Board decided to do a study to see if there was a difference in the proportion of registered men and women voters who actually vote (so he would know whom to target his campaign...
*May 17, 2010 by TJohnson*

**stats**

the head circumferences of adult males have a bell-shaped distribution with the mean= 65cm and standard deviation =2cm. a. what is the head circumference such that only 2.5% of adult males have a smaller head circumference? b. what is the head circumference such that only 2.5...
*October 9, 2012 by jenny*

**Stats - Please help**

I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I dont know whether my data is paired or not. I think that it is not paired and...
*April 25, 2011 by Isabel*

**stats**

Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred accidents that occurred on a...
*March 10, 2013 by cate*

**Statistics**

In one study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among the smokers who try to quit with the ...
*May 29, 2007 by Veronica*

**statistics**

A researcher was interested in assessing the effectiveness of the Statistics Diet as compared to a regular low calorie diet on weight loss. In the study, obese participants were randomly assigned to one of two groups: (1) the Statistics Diet, which required participants to ...
*May 3, 2014 by Matt*

**statistics**

"Separate the data by company and do descriptive stats for each. Copy and paste into a Word document, formatting appropriately. “Appropriate” includes formatting to a reasonable and appropriate number of decimals, including a good, descriptive caption for the table and ...
*April 10, 2011 by joe*

**Stats**

This assignment requires you to use Excel. In question 1, you will use the charting features. In questions 2 and 3, use the regression tool from the analysis toolpack. There is no template for this assignment. Make sure you explain your answers and provide the regression ...
*August 20, 2012 by David*

**Stats**

There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1...
*July 29, 2013 by Help please!!!*

**stats**

Particles are a major component of air pollution in many areas. It is of interest to study the sizes of contaminating particles. Let X represent the diameter, in micrometers, of a randomly chosen particle. Assume that in a certain area, the probability density function of X is...
*February 3, 2011 by Lucy*

**Stats**

Dee's store monthly sales for April, May, June are three independent random variables with means and variances as follow: April: Mean: $9500 Variance: $1250 May: Mean: $7400 Variance: $1425 June: Mean: $8600 Variance: $1610 a) find the mean and standard deviation of the total ...
*November 3, 2006 by Dee*

**Prob and Stats**

The Roper Organization conducted identical surveys 5 years apart. One question asked of women was Are most men basically kind, gentle, and thoughtful? The earlier survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. The later revealed 1,530 of the 3,...
*September 5, 2011 by Dave*

**Stats-Probability**

Would really urgently appreciate answers to these questions. Thanks. 3. Suppose that two lotteries each have n possible numbers and the same payoff. In terms of expected gain, is it better to buy two tickets from one of the lotteries or one from each? 4. A random square has a ...
*July 13, 2006 by Johnny*

**stats**

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample who answers “violence” will ...
*March 13, 2009 by jaz*

**ap stats**

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample who answers “violence” will ...
*March 18, 2009 by bobby*

**stats**

Identify the direction and all possible interpretations of each of the following correlations. Be sure to identify each example as positive, negative, or zero (not correlated). Then give all possible causal interpretations for the results. Many students in Professor Handel’s ...
*April 29, 2013 by Anonymous*

**stats multiple choice ?**

A researcher reports that "Students were randomly assignment to intervention or a control group; the two groups did not differ significantly prior to the start of the intervention. At the end of the study, those receiving the intervention showed statistically significant ...
*February 18, 2009 by ash*

**stats multiple choice ?**

A researcher reports that "Students were randomly assignment to intervention or a control group; the two groups did not differ significantly prior to the start of the intervention. At the end of the study, those receiving the intervention showed statistically significant ...
*February 18, 2009 by ash*

**STATS**

Police records in the town of Saratoga show that 18 percent of the drivers stopped for speeding have invalid licenses. If 16 drivers are stopped for speeding (a) Find the probability that none will have an invalid license. (Round your answer to 4 decimal places.) P(X = 0) = (b...
*October 30, 2010 by Helen*

**STATS**

the following case occured in Gainsville, Florida. the eight-member Human Relations Advisory Board considered the complaint of a woman who claimed discrimination, based on her gender, on the part of a local surveying company. The board, composed of five women and three men, ...
*September 27, 2010 by Hayli*

**stats need help**

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample who answers “violence” will ...
*March 14, 2009 by jaz*

**stats need help**

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample who answers “violence” will ...
*March 17, 2009 by Jaz*

**Statistics**

I have a question about one of my Stats vocab questions. any help is great. thanks! Identify the type of observational study as either Cross-sectional or retrospective (just a reminder, Cross-sectional is data measured at one point in time, retrospective is data collected from...
*January 21, 2013 by Gavin*

**Stats**

National Packing Materials Company claims its X20 box can hold loads up to at least 80 pounds. Smith Widget Company has been using the boxes for one year and feels the boxes fail at lighter loads. Hearing the complaints from Smith, the lead engineer for National Packaging ...
*September 14, 2008 by Arthur*

**Psychological stats**

I need help with a unique null hypothesis that I would then be able to use a t test statistical analysis,the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA. I understand null and...
*September 20, 2013 by Vanessa*

**Stats**

The countries of Europe report that 46% of the labor force is female. The United Nations wonders if the percentage of females in the labor force is the same in the United States. Representatives from the United States Department of Labor plan to check a random sample from 10,...
*October 31, 2007 by LT*

**Stats**

The Geometric distribution is used when we want to ﬁnd the probability of performing a sequence of trials with X “failures” before the ﬁrst “success”, where a “success” occurs with some probability p. We can denote such a random variable as X ∼ Geo(p). The ...
*September 30, 2013 by Becca*

**Stats .01 level**

A major home improvement store conducted its biggest brand recognition campaign in the company’s history. A series of new television advertisements featuring well-known entertainers and sports figures were launched. A key metric for the success of television advertisements is ...
*August 12, 2008 by Fiza00*

**stats**

if you randomly answer a t/f test and want to figure the possibililty of gettng at least an 80......how do you start and then once you have done this, what if you want to try it 4 more times? HELP Let N be the number of questions. You are asking for the probability of getting ...
*July 5, 2007 by holly*

**stats**

In order to make sure that their bags of chips are of sufficient weight, the Chipper Chip Company try to fill their 200 gram bags of chips with more than 203 grams. You have been given the task of investgating what proportion of bags produced do have over 203 grams of chips in...
*October 22, 2010 by lollzzz *

**stats**

Microbes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that exactly 4 will be mutated? b. If ten microbes from the colony are sampled, what is the probability that at most 4 ...
*October 16, 2010 by jimmy*

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