# Homework Help: Math: Statistics

## Recent Homework Questions About Statistics

**statistics and probability**

Solve for y . -2(y-3)= 5y-29 Simplify your answer as much as possible

*Monday, August 10, 2015 by mary*

**Statistics**

Suppose a multiple-choice test has 10 questions each with 5 choices. If a student guesses randomly. What is the probability that they get an B or better. ( they get at least a 80% on the exam) make sure to declare a binomial random variable and show all work

*Wednesday, August 5, 2015 by John*

**Statistics**

The research hypothesis is a vitally important element of any quantitative research study. This Discussion provides an opportunity for you to develop your own testable hypothesis based on the data set for the Final Project. To prepare for this Discussion, review this week’s ...

*Wednesday, August 5, 2015 by Yabby*

**Probability/Statistics**

The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario...

*Saturday, August 1, 2015 by Spencer*

**Statistics**

5. For the data presented below, answer the questions that follow. Score on political Score on current Individual awareness test events test 1 24 23 2 16 12 3 11 11 4 9 6 5 8 13 6 14 11 7 17 16 8 19 16 9 21 21 10 25 25 11 18 11 12 13 13 13 11 14 14 6 10 15 9 10 16 12 7 a. ...

*Saturday, August 1, 2015 by Samantha*

**Statistics**

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch, darkening in the ...

*Saturday, August 1, 2015 by Samantha*

**Statistics**

uppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 12 minutes. Consider 49 of the races. Let X = the average times of the 49 races. (a) Find the median of the average running times. ( ...

*Friday, July 31, 2015 by mathhelpplease*

**Statistics**

A sample survey interviews an SRS of 115 college women. Suppose that 68% of all college women have been on a diet within the last 12 months. What is the probability that 76% or more of the women in the sample have been on a diet?

*Friday, July 31, 2015 by mathhelpplease*

**Statistics**

What is best to measure voltage in? Mean, Median, Mode, Range?

*Thursday, July 30, 2015 by Seany*

**Statistics**

Given a histogram. How would I find out how far the mean was from the median?

*Thursday, July 30, 2015 by Seany*

**Statistics**

About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p<.05?

*Monday, July 27, 2015 by Maria*

**Statistics**

The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz cups. When 15 cups were selected at random, they were found to have a mean of 11.7 ounces with a standard deviation of 0.5 ounces. At the .01 significance level, test the claim...

*Monday, July 27, 2015 by Sabrina*

**statistics**

A lottery offers one $10000 prize, one $5000 prize and five $1000 prizes. 1000 tickets are sold at $30 each . Find the expectation if a person buys one ticket workings: 9970/1000+4970/1000+4850/1000-29790/1000 = -10000/1000 =-$10

*Sunday, July 26, 2015 by Anonymous*

**Object Oriented Analysis and Design**

3. As the head of information system, you are tasked with developing a new Client Technology Tracking System (CTTS). Coastline Systems Consulting is a provider of managed computer networks and web services located in Destin, Florida. The staff of seven IT technicians, web ...

*Saturday, July 25, 2015 by harikumar rajandran*

**statistics**

Of the Statistics graduates of a University 30%, received a starting salary of $45,000.00. If 5 of them are randomly selected, find the probability that all the graduated had starting salary of $45,000.00.

*Thursday, July 23, 2015 by Anonymous*

**Statistics**

The music industry must adjust to the growing practice o consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to determine...

*Wednesday, July 22, 2015 by Lizzy*

**Statistics**

A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true population of all voters in the state who favor approval.

*Wednesday, July 22, 2015 by Lizzy*

**Statistics**

The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set hose limits, the mean weight of quarters in circulation must be estimated...

*Wednesday, July 22, 2015 by Lizzy*

**statistics**

An online site presented this question, 'Would the recent norovirus outbreak deter you from taking a cruise?' Among 34,020 people who responded, 64% answered 'yes'. Use the sample data to construct a 90% confidence interval estimate for the proportion of

*Wednesday, July 22, 2015 by jeedo*

**statistics**

An online site presented this question, 'Would the recent norovirus outbreak deter you from taking a cruise?' Among 34,327 people who responded, 64% answered 'yes'. Use the sample data to construct a 90% confidence interval estimate for the proportion of the population of all ...

*Wednesday, July 22, 2015 by jeedo*

**Statistics**

a seed company advertises that, if its seeds are properly planted, 95% of them will germinate. What is the probability that, when 20 seeds are properly planted, at least 15 will germinate - pM( 19/20)? pq(1/20)? 20c15 20c16 all the way up to 20C10? Don't know if I am setting ...

*Tuesday, July 21, 2015 by Linda*

**Statistics**

A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true proportion of all voters in the state who favor approval.

*Monday, July 20, 2015 by Anonymous*

**Statistics**

The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a. List the different possible samples, and find the mean of each of them. b. ...

*Monday, July 20, 2015 by Elizabeth*

**Statistics**

A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Cavalier shows that the mean is 4.5 hours and the standard deviation is .6 hours. If 42 mechanics are randomly selected, find the probability that their mean rebuild time is less than 3.5 ...

*Monday, July 20, 2015 by Elizabeth*

**Statistics**

The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to ...

*Monday, July 20, 2015 by Elizabeth*

**Statistics**

75 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 10.2 pounds and a standard deviation of 2.9 pounds. What is the 95% confidence interval for the true mean weight of all packages by the parcel service?

*Monday, July 20, 2015 by Elizabeth*

**Statistics**

The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set those limits, the mean wight of quarters in circulation must be estimated...

*Monday, July 20, 2015 by Elizabeth*

**Statistics**

A sample of 106 body temperatures resulted in a mean of 98.2 degrees and a standard deviation of .62 degrees. Use these sample statistics to construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.

*Monday, July 20, 2015 by Elizabeth*

**Elementary statistics**

Scores on an English test are normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the value of the first quartile.

*Monday, July 20, 2015 by Lizzy*

**Elementary Statistics**

The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.39 inches and a standard deviation of 0.04 inches. If 500 pencils are selected how many would you expect to have a diameter more than 0.33 inches?

*Monday, July 20, 2015 by Lizzy*

**statistics in math**

what is an confidence interval?

*Monday, July 20, 2015 by Annie George*

**Probability/Statistics**

The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario...

*Monday, July 20, 2015 by Spencer*

**Probability and statistics**

The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990 models: 140 160 20 20 ...

*Monday, July 20, 2015 by Anna*

**Math 115 Statistics**

In the game of craps, the player rolls two balanced dice, 36 equally likely outcomes, compute the probability the player looses on the first roll if the sum of the dice is 3, 4, or 6.

*Saturday, July 18, 2015 by Tamiko*

**Statistics**

The table I have is: Color of Candy Frequency Proportion (as a fraction and decimal) Percentage Red 13 13/100 or .13 13% Orange 25 25/100 or .25 25% Yellow 8 8/100 or .08 8% Brown 8 8/100 or .08 8% Blue 27 27/100 or .27 27% Green 19 19/100 or .19 19% TOTALS 100 100/100 or 1 ...

*Monday, July 13, 2015 by Destiny Park*

**Criminal Justice**

Success in probation/parole: A. is usually conceived of in terms of recidivism. B. depends on which statistics one decides to emphasize. C. is complicated by the issue of selection. D. all of the above im confused between A and C

*Monday, July 13, 2015 by Amy*

**Statistics**

Suppose you have a sample of 6 observations from a normal population. The sample variance is equal to 4. Find a 90% lower confidence interval for the variance of the population.

*Saturday, July 11, 2015 by Chase*

**statistics**

u=100 and standard deviation of P=20. error between sample mean and population mean of n=16 is 5 points and error between sample mean and population mean for a sample of n=100 is 2 points. explain

*Thursday, July 9, 2015 by Anonymous*

**Statistics**

Police stopped 527 drivers. Of those stopped, 298 were ticketed. Of those 298, exactly 127 were cited for more than one violation. Estimate the probability that a driver who was stopped got a ticket. Which way is the correct one? 1/527=.0018 or 1/298=.003 Or am I way off?

*Thursday, July 9, 2015 by Kim*

**Statistics**

If 67% of cars have automatic tranny's & 8 cars are selected at random what is the probability that fewer than 4 have an automatic tranny

*Wednesday, July 8, 2015 by Kim*

**statistics**

Unknown to a quality-control inspector, 20% of a very large shipment of electric switches are defective. The inspector has been told to reject the shipment if, in a sample of 15 switches, 2 or more are defective. The probability that the shipment will be rejected is: I do not ...

*Tuesday, July 7, 2015 by helpmeplease*

**statistics**

Average is 8500 with a standard deviation. Of 1500 with a z score of -2.98 a z score of +1.00 what are the actual bonuses

*Tuesday, July 7, 2015 by Anonymous*

**statistics**

If I am using a venn diagram, the probability that event A occurs or event B occurs but not both. What is my formula? I am soooo very confused..

*Tuesday, July 7, 2015 by cat*

**statistics**

Joe owns a clothing store, he keeps 15% of the shirts on display in the window. he knows if a shirt is in the window there is a 70% chance of it being sold that week. The probability that the shirt in the display window will be sold within the week is????? and is this an ...

*Tuesday, July 7, 2015 by cat*

**Math statistics**

A mountain search and rescue team received an average of 600 calls per year. Use the poisson dustribution to find the probability that on a randomly selected day, they will receive 1 or more calls.

*Tuesday, July 7, 2015 by Lizzy*

**Math statistics**

Ten percent of Americans adults are left-handed. A statistics class has 50 students in attendance. Find the standard deviation for the number of left-handed students in such classes of 50 students

*Tuesday, July 7, 2015 by Lizzy*

**Math statistics**

For a certain computer program a password must be exactly 5 characters long. The first character must be a mnber 0-8, the second, third and fourth character can either be one of the 26 letters or a number 0-5, the fifth character has to be exactly the same as the second ...

*Tuesday, July 7, 2015 by Lizzy*

**Math Statistics**

In the power ball lottery game, winning the jackpot requires that you select the correct five unique numbers between 1 and 58 inclusive (don't have to match the order) and, in a separate drawing, you must also select the correct single nber between 1 and 13 inclusive. Find the...

*Tuesday, July 7, 2015 by Lizzy*

**statistics**

TRUE OR FALSE 35. A survey of women owned business found that approximately 30% of all small businesses are owned by non‐Hispanic white women. In a sample of 250 non‐Hispanic businesses owned by whites, the average number of businesses owned by female would be 75. ...

*Monday, July 6, 2015 by meri*

**statistics**

The US Environmental Protection Agency reports the average fuel costs for various makes of cars. In recent years the fuel costs for mid‐size Japanese cars averaged $1200. Suppose that the annual fuel costs for various makes of automobiles are normally distributed and ...

*Monday, July 6, 2015 by meri*

**statistics**

15. A financial consultant conducts seminars with each seminar limited to 20 attendees. Because of the small size of the seminar, and the personal attention each person receives, a large number of attendees are expected to become clients. From the past experience, ...

*Monday, July 6, 2015 by meri*

**statistics**

11. You are taking a multiple choice examination that has 20 questions in a particular section with 5 possible answers for each question. You did not study for the test and you guessed the answers. The probability that you will get at least 50% of the problems correct by ...

*Monday, July 6, 2015 by meri*

**statistics**

7. The following statements are true for a binomial distribution except: (a) Binomial is a continuous probability distribution. (b) There are n number of trials. (c) There are two possible outcomes for each trial: Success (S) and Failure (F). (d) The trials are independent of ...

*Monday, July 6, 2015 by meri*

**Statistics**

The probability distribution of number of calls coming to a call center every 15 minute period is shown below. x 5 6 7 8 9 10 11 12 13 p ( x ) 0.02 0.04 0.07 0.08 0.09 0.11 0.12 0.13 0.10 Continued… x 14 15 16 17 18 19 20 p ( x ) 0.07 0.06 0.04 0.03 0.02 0.01 0.01 1. This ...

*Monday, July 6, 2015 by meri*

**statistics**

the probability of NOT drawing either a club or a queen from a standard deck of 52 cards is???

*Sunday, July 5, 2015 by cat*

**Statistics**

Please Help me understand how to work this problem. I have been working on this problem for several days and do not understand what to do. Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs, of people the linear correlation coefficient is 0.922 and...

*Saturday, July 4, 2015 by Shannon*

**statistics /pure maths**

A box contains N identical balls of which 4 are Red, 3 are Green and the rest are White . If 3 balls are drawn at random one after the other without replacement.the probability that all 3 balls are Whit is 1/22. 1.Find the number of identical balls in the container . 2.Find ...

*Thursday, July 2, 2015 by gbafa*

**Statistics**

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1264 chips and a standard deviation of 116 chips. (a) Determine the 28th percentile for the number of chocolate chips in a bag. (b) Determine the number of ...

*Tuesday, June 30, 2015 by Amanda*

**Statistics**

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1264 chips and a standard deviation of 116 chips. (a) Determine the 28th percentile for the number of chocolate chips in a bag. (b) Determine the number of ...

*Tuesday, June 30, 2015 by Amanda*

**Statistics**

How would you do this problem The following is a list of ten measurements: 35,36,-38,-18,73,9,0.-67,-64,-59 10 over Sum under that is i=1 then sum-33xi how do I find the answer

*Tuesday, June 30, 2015 by Mary Ann K*

**statistics**

How do I find the probability of an event A occurring or an event B occurring but not both? How do find this equation with a Venn diagram?

*Tuesday, June 30, 2015 by cat*

**statistics**

what is the equation to figure a slope of a line?

*Tuesday, June 30, 2015 by Anonymous*

**statistics**

Jesse took two data points from the weight and feed cost data set and calculated a slope, or average rate of change. A rat weighs 3.5 pounds and costs $4.50 per week to feed, while a Beagle weighs 30 pounds and costs $9.20 per week to feed. Using weight as the explanatory ...

*Tuesday, June 30, 2015 by Anonymous*

**statistics**

34. Two students (say A, and B) are challenged to solve a problem in statistics. Suppose that the probability that A will solve the problem is 40%, the probability that B will solve the problem is 55%, and the probability that A or B will solve the problem is 25%. The ...

*Tuesday, June 30, 2015 by meri*

**statistics**

Let, the Sample space, S={1,2,3,4,5,6,7, 8} A={1,3,5,7} B={1,3,4,6,7,8} C={1,7,8} 31. The intersection of A and B is: (a) A B {1,3,7} (b) A B {1,3,7,8} (c) A B {1,3} (d) A B {1,3,6,7} 32. The value of A...

*Tuesday, June 30, 2015 by meri*

**statistics**

30. The probability that a person can get infected with a rare type of blood disorder is very small. Suppose that a blood test performed on 10,000 people showed that two persons tested positive that is, a 0.02% chance of getting this type of blood disorder. This probability ...

*Tuesday, June 30, 2015 by meri*

**statistics**

28. From a group consisting of 8 married couples, one man and one woman are to be selected. The probability that the man and woman selected are husband and wife if the selection is equally likely is (a) 5% (b) 50% (c) 12.5% (d) 8.5% 29. A survey at a big mall in a city showed ...

*Tuesday, June 30, 2015 by meri*

**statistics**

26. The law of permutations, combinations, and filling slots are the counting rules used to (a) determine the total number of possible outcomes (b) determine all possible combinations of “n” objects from a total of N objects (c) determine the odds of winning a lottery (d) ...

*Tuesday, June 30, 2015 by meri*

**statistics**

24. Suppose there are five traffic lights that you need to pass while driving from your work to school. The probabilities that you will stop for these red lights are: 0 red light with probability 0.05, 1 red light with probability 0.45, 2 red lights with probability 0.30, 3 ...

*Tuesday, June 30, 2015 by meri*

**statistics**

22. A company is planning to expand its operations. They are currently considering 9 different locations. Two of these are in Ohio. If the locations are selected at random from the 9 locations being considered, the probability of selecting the two sites in Ohio is (a) 0.056 (b...

*Tuesday, June 30, 2015 by meri*

**statistics**

20. A company must select 3 employees from a department that has a total of 5 employees to attend a workshop in quality management. The number of possible selections are (a) 15. (b) 60. (c) 10. (d) 20. 21. From a group of 5 men and 4 women, a committee is to be formed ...

*Tuesday, June 30, 2015 by meri*

**statistics**

17. All three‐digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 without repeating the digits are (a) 50. (b) 60. (c) 15. (d) 71. 18. One of the counting rules used to determine the total number of possible outcomes for experiments in which the order of ...

*Tuesday, June 30, 2015 by meri*

**statistics**

15. The probability that a recently offered stock by a technology company will double in value within the next three months is 90%. The conclusion regarding this probability estimate was reached based on the opinion of the experts in the technology field to which this stock ...

*Tuesday, June 30, 2015 by meri*

**statistics**

12. The probability that the Dow Jones stock index will close above 18000 at the end of the year is an example of (a) classical probability. (b) subjective probability. (c) independent probability. (d) priory probability. 13. The probability calculated based on observing a ...

*Tuesday, June 30, 2015 by meri*

**Statistics**

10. Five cards are drawn from a well shuffled pack of 52 playing cards. It can be shown that (disregarding the order in which the cards are dealt) there are 2,598,960 possible fivecard hands, of which only 1287 are hands consisting entirely of spades. What is the probability ...

*Tuesday, June 30, 2015 by meri*

**statistics**

8. A survey was conducted to learn about the shopping preference of consumers during the holiday season. Out of 2000 respondents 22% said they would prefer to shop online because of the free shipping offered; 45% said that they would like to shop in malls and discount outlets ...

*Tuesday, June 30, 2015 by meri*

**statistics**

5. Consider the probabilities in problem 4. The probability that a randomly selected single book purchase will not be for a work of fiction is (a) 0.80 (b) 0.25 (c) 0.20 (d) 0.30 (e) 0.75 6. Two dice are rolled. Suppose A is the event the sum of the numbers on the top faces is...

*Tuesday, June 30, 2015 by meri*

**Statistics**

3. A bookstore sells two types of books (fiction and nonfiction) in several formats (hardcover, paperback, digital, and audio). Consider an experiment that consists of observing the type and format of a single book purchase, two possible outcomes are a hardcover fiction book ...

*Tuesday, June 30, 2015 by meri*

**Statistics**

1. Consider an experiment that consists of rolling a pair of dice. There are 36 possible outcomes for this experiment which are equally likely. What is the probability of getting a total of 3 or 5 for this experiment? (a) 1 /3 (b) 20/36 (c) 1/36 (d) 1/6 (e) 1/2 2. A car dealer...

*Tuesday, June 30, 2015 by meri*

**business statistics**

using empirical formula a company is studying the number of daily debit card purchases. THere were 20 purchases and the probability of a debit card purchase is 0.5. what is the stadnard deviation of the number of debit card purchases

*Monday, June 29, 2015 by Anonymous*

**Maths statistics**

In a 60 MA Economics students selected as sample are found to have a mean height of 68 inches and a 50 MBS students selected as sample have a mean height of 69 inches. Would you conclude that management students are taller than economics students? Assume that standard ...

*Sunday, June 28, 2015 by Kiran*

**statistics**

Go to a local library; collect a sample of books consisting of the ages of book (based on copyright dates). Plan and describe the sampling procedure, then use the results to construct a confidence interval estimate of the mean age of all books in the library. Please, post and ...

*Friday, June 26, 2015 by jen*

**Math - Statistics**

The proportion of red M&M's made is 0.24. Suppose one took a random sample of 51 M&M's. (a) What is the probability that an SRS of 51 M&M's has as its proportion of red M&M's 0.23 or below? (b) Find the 80th percentile for sample proportions of red M&M's in samples of size 51.

*Thursday, June 25, 2015 by Samantha*

**statistics**

Jesse took two data points from the weight and feed cost data set and calculated a slope, or average rate of change. A rat weighs 3.5 pounds and costs $4.50 per week to feed, while a Beagle weighs 30 pounds and costs $9.20 per week to feed. Using weight as the explanatory ...

*Wednesday, June 24, 2015 by cat*

**statistics**

Jesse put the heartbeat and lifespan data into a statistical software program and found the coefficient of determination to be 64%. The value of the correlation coefficient is __________.

*Wednesday, June 24, 2015 by cat*

**statistics**

Using the regression equation ŷ = .3 + .12x, the predicted weekly food cost for a hedgehog weighing 1.3 pounds is __________.

*Wednesday, June 24, 2015 by cat*

**Statistics**

Answer “True” if the statement is always true. If the statement is not always true, replace the underlined words with words that make the statement always true. Alpha is the measure of the area under the curve of the standard score that lies in the rejection region for Ho.

*Tuesday, June 23, 2015 by shuggins*

**statistics**

A study of 600 college students taking statistics revealed that 54 students received the grade of A. Typically 10% of the class gets an A. The difference between this gourp of students and the expected value is not significant at the 0.05 level. What does this mean?

*Tuesday, June 23, 2015 by mary*

**Statistics**

brewery's filling machine is adjusted to fill bottles with a mean of 33.8 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability that the next randomly...

*Saturday, June 20, 2015 by Nick*

**statistics**

The instructor’s sample produces a mean number of days absent of 3.5 days. This value is an example of a:

*Saturday, June 20, 2015 by Patty*

**Statistics**

Regression analysis was applied between sales data (in $1,000s) and advertising data (in $100s) and the following information was obtained. ~ y = 12 + 1.8x n = 17 SSR = 225 SSE = 75 sb1 = 0.2683 Refer to Exhibit 12-3. The critical F value at a = 0.05 is a. 3.59 b. 3.68 c. 4.45...

*Friday, June 19, 2015 by Yazzy*

**Math - Statistics**

The increase or decrease in the price of a stock between the beginning and the end of a trading day is assumed to be an equally likely random event. What is the probability that a stock will show a decrease in its closing price on eleven consecutive days? (Round to four ...

*Friday, June 19, 2015 by Derrin*

**Statistics**

How do you find the p-value??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have ...

*Friday, June 19, 2015 by Becca*

**statistics**

P( 1.05 < Z < 2.05) Need help solving please

*Thursday, June 18, 2015 by belle*

**Statistics**

A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective? What is the Null and alternative hypothesis.

*Thursday, June 18, 2015 by James*

**Statistics**

X 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.05 =As the manager you check the cashier ( to see if you need to open a new cashier line). What is the probability that you find exactly 2 people waiting in line? please need to know how to solve it

*Wednesday, June 17, 2015 by Larry*

**statistics**

a private opinion poll is conducted for a politician to determine why proportion of the population favors decriminalizing marijuana possession. how large a sample is needed in order to be 90 percent confident that the sample proportion will not differ from the true proportion ...

*Monday, June 15, 2015 by ash*

**statistics**

twelve different vTideo games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct a 95...

*Monday, June 15, 2015 by melissa jones*

**Statistics**

A random sample of 100 cable TV movies contained an average of 3.38 acts of physical violence per program. At the 99% level what is your estimate of the population value? mean = 3.38 s = 0.30 N = 100

*Sunday, June 14, 2015 by Christina*

**Statistics**

A researcher measures how positive a person’s mood is and how creative he or she is, obtaining the following interval scores: Participant Mood X Creativity Y 1 10 7 2 8 6 3 9 11 4 6 4 5 5 5 6 3 7 7 7 4 8 2 5 9 4 6 10 1 4 (a) Compute the statistic that summarizes this ...

*Saturday, June 13, 2015 by baegirl*