Wednesday

August 20, 2014

August 20, 2014

Number of results: 7,820

**writing **

When citing statistics from a web page in your speech you need to provide which of the following: ALL The date and source of the statistic What population(s) the statistic represents The author responsible for the statistic or quotation
*May 10, 2012 by Anonymous*

**pROBABILITY AND STATISTIC..HELP...................**

a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be detected if n=2 and n=4
*February 26, 2013 by Rrjey*

**Math Help**

Poll of statistic students revealed that 44% study alone, 31% study in a group, 12% study both alone and in a group Find the probability that a randomly selected statistic student studies alone but not in a group.
*October 17, 2007 by Taylor*

**Statistic**

6.16 Calculate each binomial probability: a. X = 2, n = 8, ð = .10 b. X = 1, n = 10, ð = .40 c. X = 3, n = 12, ð = .70 d. X = 5, n = 9, ð = .90
*August 27, 2010 by Kim *

**statistic and probability**

a disk drive is randomly selected from 50 available disk drives, of which five are defective. What is the probability that it is not defective?, hope you answer this, thanks! :)
*September 20, 2012 by nitz*

**statistic**

Roll two 6-sided dice and examine their sum. a) How long will it take to roll "snake-eyes" (a pair of ones)? b) What is the probability of rolling a sum of 7 on the first roll? c) What is the probability of rolling a sum of 7 on the fourth roll? d) What is the probability of ...
*April 1, 2014 by Bill*

**statistic**

How can the probability distribution of prices of new cars be described
*September 21, 2011 by Simone*

**statistic**

How can the probability distribution of prices of new cars be described
*September 21, 2011 by Simone*

**statistic**

A coin is tossed 6 times. Find the probability that all 6 tosses are tails.
*November 13, 2013 by Michaela*

**Statistic**

If you roll a die 35 times and 7 of the rolls result in a "5," what empirical probability was observed for the event "5"?
*September 18, 2012 by Bibi*

**statistic**

You draw one card from a shuffled standard deck or cards (cards are in four suits-red diamonds, red heart, black clubs and black spades-and are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability of drawing a queen c...
*March 14, 2014 by Helen*

**statistic**

You draw one card from a shuffled standard deck or cards (cards are in four suits-red diamonds, red heart, black clubs and black spades-and are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability of drawing a queen c...
*March 16, 2014 by HELEN*

**statistic math**

it is known that 5% of all parts manufactured at Plant F are defective. If 30 part are randomly selected what is the probability that all 30 parts are not defective and what is the probability that at least one of the 30 parts is defective?
*July 22, 2010 by alexis*

**statistic**

based on 125 flights, 76% arrive on time. whats the probability that 80 flights arrive on time, probability that 20 or less flights are late?
*November 23, 2011 by mark*

**Statistic**

In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66 What are the inner fences?
*May 18, 2014 by Ellis *

**College and Math Courses**

Is statistic 243 equivalent to AP Statistic?
*November 15, 2013 by Anonymous*

**Animal Science**

I need a statistic of how many dogs and cats are currently in a foster home in the us. Does anyone know a website that has this credible statistic? thanks
*November 30, 2011 by hannah*

**Statistic**

Below are listed the numbers of doctors in various specialties by gender. Pathology Pediatric Psychiatry Male 12,575 33,020 27,803 Female 5,604 33,351 12,292 Choose 1 doctor at random. (a) Find the probability of choosing a Pathologist or a female? b.) Find the probability of ...
*March 24, 2013 by Bella*

**STATISTIC**

IT IS IMPOSSIBLE TO GET 7 KINGS WHEN SELECTIONG CARDS FROM A SHUFFLED DECK. EXPRESS THE INDICATED DEGREE OF LIKELIHOOD AS A PROBABILITY VALUE BETWEEN 0 AND 1 INCLUSIVE.
*June 1, 2013 by MAXINE*

**statistics**

I need so help figuring out which statement is true or false. 1. A parameter always describes a larger group than a statistic. 2. The sampling distribution of a statistic is the distribution of values taken by the statistic in all possible samples of all possible sizes from ...
*February 5, 2009 by Sue*

**Statistic**

Under 20 21-30 31-40 Male 12 12 17 Female 13 16 21 If two people are selected at random, what is the probability they are both female?
*August 24, 2008 by Angela*

**statistic**

Given a normal population with ì = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
*March 9, 2011 by kim*

**Math**

I'm really stuck on these STATS questions.Can someone please help! 1. The probability of a car in a population having faulty brakes is .05. If we take a sample of 150 cars, find the standard deviation of the sampling distribution. 2. The strength of ten I-beams produced in a ...
*June 20, 2013 by mysterychicken*

**Statistics**

How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions? A. They help us to measure or estimate of the likelihood of a certain statistic falling within the class bounds. B. They help us visualize the ...
*September 26, 2010 by Randy*

**Statistic **

An airline experiences a no-show rate of 6%. What is the maximum number of reservations that it could accept for a flight with a capacity of 160, if it wants the probability of accommodating all reservation holders to be at least 95%.
*January 25, 2013 by Anonymous*

**statistic**

roll 2 standard dice and add the numbers. what is the probability of getting a number larger than 9 for the first time on the third roll?
*January 15, 2011 by linn*

**statistic & probability**

How many 5 digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6 if repeition are not allowed. do i use 7P5? since i am choosing 5 numbers from 7 and they can't be repeated?
*June 14, 2012 by Anonymous*

**statistic homework**

suppose that a detective file in new orleans has 63 current unsolved murders. what is the probability that at least 35 of the victims knew their murders
*July 10, 2013 by rissa*

**statistic & probability**

An order of ward presentation has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia, and Paul. How many ways can the men be presented first and then the women?
*June 14, 2012 by Anonymous*

**Stats**

2 samples were collected to determine whether there was a difference between two weight loss methods targeting men. The average weight loss method is provided for the 2 samples along with the respective standard deviations. Is the second method - with an average weight loss of...
*February 23, 2007 by Jason L*

**statistic**

a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 175 and a standard deviation of 15. if an applicant is randomly selected, find the probability of a rating that is between 150 and 200
*April 27, 2012 by charmaine*

**Statistics**

The p-value is the probability of the observed statistic given the null hypothesis is true. A) True B) False False?
*November 4, 2013 by Penny*

**Statistic**

If a person told you what month he was born, would it be unusual to guess the date of his birth ( not including the year)? Justify your answer. (Note: An event is to be considered "unusual" if its probability is less than or equal to 0.05.)
*October 1, 2012 by Anonymous*

**statistic help please**

2. A survey of 259 families was made to determine their vacation habits. The two way table below sorts the families by location and the vacations by the length of the vacation. Rural Suburban Urban Total 1–7 days 80 39 37 156 8ormore days52 32 19 103 Total 132 71 56 259 What ...
*March 16, 2014 by shantel*

**statistic**

3 statistics professors and 7 chemistry professors are available to be advisors.If each professor has an equal chance of being selected, what is the probability that both professors are cgemistry professors?
*November 13, 2013 by Michaela*

**Statistics**

To do inferential procedures comparing two proportions, we need another variance formula (our ruler). This formula is based on what principle? A) The variance of the difference of two statistics is the difference of the variances of each statistic. B) The variance of the ...
*November 15, 2013 by Katie*

**Math-Statistics**

Suppose you want to test the claim that mean is not equal 3.5. Given a sample size of n = 45 and a level of significance of a = 0.10, when should you reject H0 ? A) Reject H0 if the standardized test statistic is greater than 1.96 or less than -1.96 B) Reject H0 if the ...
*December 12, 2009 by Jenny*

**statistic**

For a two-tailed hypothesis test, the test statistic is z = 1.42. What is the p-value?
*October 29, 2013 by Anonymous*

**statistics**

Suppose you want to test the claim that mu is not equal to 3.5. Given a sample size of n = 31 and a level of significance of alpha = 0.10 when should you reject Ho? A) Reject Ho if the standardized test statistic is greater than 2.575 or less than -2.575. B) Reject Ho if the ...
*June 21, 2011 by Brittany*

**statistic**

how a t Test for a dependent variable can be of great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?
*December 15, 2010 by smith*

**statistics**

The below table shows the probabilities generated by rolling one die 50 times and noting the up face. What is the probability of getting an odd up face? roll 1 Probability 0.22 roll2 probability 0.10 roll 3 probability 0.18 roll 4 probability 0.12 roll 5 probability 0.18 roll ...
*May 3, 2012 by sc*

**math probability**

this is a probability question... Suppose you are asked to choose a whole number between 1 and 13 inclusive. (a) what is the probability that it is odd?...7/13 (b) What is the probability that it is even?...6/13 (c) what is the probability that it is a multiple of 3?...4/13 (d...
*December 18, 2008 by joe*

**Statistics**

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 449 babies were born, and 250 of them were girls. Use the sample data with .01 significance level to test the claim that with this method, the probability of a baby being a...
*November 26, 2013 by Help Please! *

**math**

A statistic professor plans classes so carefully that the lengths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class period time is less than 51.75 minutes
*November 29, 2013 by jamie*

**statistic **

A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question? b. On average, how many questions would a student get correct for the entire test? c. ...
*January 27, 2013 by Nickie*

**math**

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I know 1.07 is a statistic. Please explain ...
*February 27, 2013 by please help*

**Statistic 103**

The average teachers salary in Connecticut( ranked first among states) is $57,337. suppose that the distribution of salaries is normal with a standard deviation of $7500. What is the probability that a randomaly selected teacher makes less than $52,000 per year?
*April 13, 2011 by Jennifer*

**Statistics**

To determine whether themean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy program tests: Ho: mu = 1.4 Ha: mu > 1.4 The calculated value of the test statistic is z = 2.42. ==> How do I calculate the p-...
*February 27, 2011 by Emily*

**math**

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I understand that 1.07 is a statistic. ...
*February 26, 2013 by Please help*

**pROBABILITY AND STATISTIC..HELP...................**

A small store installed a diesel-powered generator for emergency power outage because they function independently of electric power. The past history of the town indicates that on about 5% of days during summer the town loses electricity due to high winds. However, high winds ...
*January 30, 2013 by Rrjey*

**statistics**

mortgage broker is offering home mortgages at a rate of 9.5%, but the broker is fearful that this value is higher than many others are charging. A sample of 40 mortgages filed in the county courthouse shows an average of 9.25% with a standard deviation of 8.61%. Does this ...
*June 19, 2013 by Rald*

**statistic**

Quiz has 6 questions. Each question has five possible answers, only one of each 5 answers is correct. If student randomly guesses on all six questions, what is the probability to answer 2 questions right? Tip: first, you have to define parameters of Binomial distribution: n - ...
*December 4, 2010 by tanya*

**hypothesis statistic**

how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score. Respond to at least two of your fellow students’ postings.
*December 15, 2010 by smith*

**statistic**

In order to attract customers, an ice cream company has started a STAR game. Any person who collects four stars gets a free family size bucket of ice cream. Suppose that the probability of an ice cream pack contains a star is 0.3 (an ice cream pack cannot contain more than one...
*October 24, 2011 by anrt*

**Business Statistic**

X f(x) 0 .25 1 .20 2 .15 3 .30 4 .10 Is it prpbsbility distribution valid? Explain and list the requirement for a valid probability distribution Calculate the expected value x Calulate the variance of x calculate the standard deviation of x
*October 16, 2010 by Laverne *

**Statistic **

In a jar there 12 white balls 8 red balls 4 greens all with the same size if a person selects one ball at random find the probability it is a red ball.
*March 18, 2013 by Morena*

**Statistic**

A urn contains 21 red balls, 14 white balls If we randomly select 2 balls, one after the other without replacement, what is the probability that both of the balls selected are red?
*March 24, 2013 by Bella*

**statistic**

will you help with my statistic class
*December 13, 2013 by Patricia*

**statistic **

If 55% of a television viewing population watched a program called ¡§Name that Poem¡¨ one evening, what is the probability that, in a random sample of 100 viewers, less than 50% of the sample watched the program?
*April 7, 2012 by Nancy*

**statistic homework **

If 55% of a television viewing population watched a program called ¡§Name that Poem¡¨ one evening, what is the probability that, in a random sample of 100 viewers, less than 50% of the sample watched the program?
*April 4, 2012 by Nancy*

**statistic**

Given TWO SETS of congruent angles, what is the probability of selecting two consecutive angles that are congruent?
*December 3, 2008 by mitch*

**statistics**

After years of data collection by college students, it has been determined that the distribution of course grades in Ms. Green’s Statistic II class follows a normal distribution with a mean of 62 and a standard deviation of 14. (a) A student will pass Ms. Green’s course if he ...
*May 9, 2011 by Karen*

**statistic**

I a 3 team league the teams play each other once per year. Team A won 3 over a 2 year period. Team B won 4 and Team C won 5 What is the probability of Team wining all two games next season
*February 19, 2014 by chris*

**URGENT Statistics**

In performing two-tailed hypothesis test with v=20, you obtain a t-statistic of 2.41. The p-value is: Between 2% and 5%. I need help understanding how this range was gotten. I know that the t-statistic is between t.025 and t.01 and since this is a 2-tailed test these t-values ...
*December 10, 2010 by Rhea*

**statistic**

in a beacside it rains on 20percent of days and is windy on 30percent a days.if rain and wind are independent on any particular days find the probability that it rains and it windy
*August 13, 2014 by junu*

**statistic**

if the p value of the test statistic id equal to 1.36, then the p-value is
*May 8, 2014 by Anonymous*

**math statistic**

The Chicago Public School system has about 680 schools. About 130 of the schools will be closed. If five schools are chosen at random find the probability that at least 3 of them will be closed.
*April 3, 2013 by Evie*

**statistics**

solve this math statistic problem: an insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?
*March 24, 2013 by Anonymous*

**STATISTIC HELP**

1.M&M candies are great for probability. The following tables are the color distributions for the candies. Fill in each table with the missing probability and answer the questions that follow. Plain Brown Blue Green Orange Red Yellow Probability 0.3 0.1 0.1 0.1 0.02 ??? ...
*March 12, 2014 by bowershe*

**statistic **

A roulette wheel has alternating red and black numbered slots into one of which the ball finally stops to determine the winner. If a gambler always bets on black to win, what is the probability of winning at least 24 times in a series of 36 spins? (Note that at least 24 wins ...
*January 27, 2013 by Nickie*

**Math**

In an experiment, the probability of the event E is known to be .4. Also the probability of the event F is .8,and the probability of E∪F is 1. i) Compute the probability of these events: P(E∩F)= P(E-F)= ii) Suppose the experiment is run twice in succession. What ...
*April 21, 2011 by Tracy*

**Math**

A spinner has numbers 1-16 on it. Probability of 6? 1/16 Probability not 6 15/16 Probability even number 8/16 Probability multiple of 3 5/16? Probability not a multiple of 3 11/16?
*November 28, 2012 by Jerald*

**Statistic**

The amount of time it takes to take your order at the local Whaters restaurant has a population mean m of 3.1 minutes and a standard deviation s of 0.40 minutes. If you select a random sample of 16 customers: Q-3a: What is the probability that the mean time spent per customer ...
*August 12, 2012 by Betty*

**Statistics**

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 23, 2007 by Jason L*

**statistic**

A grain mill manufactures 100-pound bags of flour for sale in restaurant supply warehouses. Historically, the weights of bags of flour manufactured at the mill were normally distributed with a mean of 100 pounds and a standard deviation of 15 pounds. a. What is the probability...
*December 6, 2012 by anonymous*

**math - stats**

It is believed that at least 60% of voters from a certain region in Canada favor the free trade agreement (FTA). A recent poll indicated that out of 400 randomly selected individuals, 250 favored the FTA. If we wished to perform a test to determine whether the proportion of ...
*December 19, 2012 by barbra*

**Finite Math**

An urn contains sixteen red balls and seventeen white balls. A sample of three balls is selected at random and the number of red balls observed. Determine the probability distribution for this experiment: Number of Red Balls/Probability 0...Probability=? 1...Probability=? 2......
*April 5, 2012 by Amanda*

**statistic**

Suppose that the distribution of household incomes in the United States is approximately normal with a mean of 69.8 thousand dollars, and a standard deviation of 15 thousand dollars. a) Find the probability that a randomly selected household would have an income between 66 and...
*November 13, 2013 by shreyash*

**statistic**

A lottery ticket has a grand prize of $28 million. The probability of winning the grand prize is .000000023. Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Show your calculations and reasoning clearly.
*August 27, 2010 by Kim *

**Statistic Please Check**

Check this out please Thanks Lesson 3 Unit 2 Probability Couplements, Disjoint Events and the addition Rule 1.M&M candies are great for probability. The following tables are the color distributions for the candies. Fill in each table with the missing probability and answer the...
*March 11, 2014 by bowershe*

**math-probability**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*November 30, 2009 by GG*

**Statistic**

A statistic instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and weighed the bags.They weighed 10.4, 10.9 , 10.8, and 9.9 pounds.assume that the distribution of the weights is normal. Find a 95% confidence interval for the mean weight of all bags ...
*December 6, 2013 by Jaz*

**Math Probability **

If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
*April 16, 2012 by Antonio*

**statistic & probability**

Question: a resturant offers 6 possible appetizers, 11 possible main courses, and 5 possible desserts. How many different meals are possible at this restuant? two meals are considered different unless all three courses are the same. is it (22 C 3)?
*June 13, 2012 by Anonymous*

**math-statistics help**

A pharmaceutical manufacturer forms tablets by compressing a granular material that contains the active ingredient and var. fillers. The hardness of a sample from each lot of tablets produced is measured to control compression. The target values for the hardness are mean=11.5...
*February 21, 2007 by jisun*

**statistics**

a random sample of 80 college students was selected to participate in a experiment. the mean of the sample is 317 points, the standard deviation of 37 there are 310 students that didn't complete the experiment 1. compute the appropriate test statistic? 2. what is the critical ...
*July 11, 2012 by Anonymous*

**statistics**

Find the test statistic, P-value, and critical value. Round to 3 decimal places. Claim: The mean IQ score of statistics professors is greater than 118. Sample data: n = 50, x = 120. Assume that σ = 15 and the significance level is α = .05 test statistic = P-value = ...
*April 8, 2014 by larae*

**Math - Statistics**

I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...
*March 29, 2007 by Lauren*

**math**

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I know 1.07 is a statistic. I understand the...
*February 28, 2013 by Please help*

**statistic**

Suppose a random sample of 25 students is selected from a community college where the scores in the final exam (out of 125 points) are normally distributed, with mean equal to 112 and standard deviation equal to 12. Find the probability that the sample mean deviates from the ...
*November 8, 2012 by Coco*

**Probability Math **

Event A has probability of 0.2 and event B has probability of 0.3. If they are independent, what is the probability that both of them happen? I can't remember how to do this one.
*September 29, 2013 by Alex*

**statistic **

Over the past 10 years, the local school district has measured physical fitness for all high school freshmen. During that time, the average score on a treadmill endurance task has been μ 19.8 minutes with a standard deviation of 7.2 minutes. Assuming that the ...
*January 27, 2013 by Nickie*

**Math**

10. A coin is loaded so that the probability of heads is 0.55 and the probability of tails is 0.45, Suppose the coin is tossed twice and the results of tosses are independent. a.What is the probability of obtaining exactly two heads? b.What is the probability of obtaining no ...
*March 2, 2014 by Renee*

**math**

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I know 1.07 is a statistic. Please explain ...
*February 27, 2013 by Please help*

**math-test statistic**

If we have a sample of 12 drawn from a normal population, then we would use as our test statistic A) z0 with 11 degrees of freedom B) t0 with 12 degrees of freedom C) z0 with 12 degrees of freedom D) t0 with 11 degrees of freedom
*December 5, 2009 by jason*

**statistics/probability**

One statistic used to assess professional golfers is driving accuracy, the percent of drives that land in the fairway. Driving accuracy for PGA Tour professionals ranges from about 40% to about 75%. Tiger Woods hits the fairway about 60% of the time. One reason why the Normal ...
*June 17, 2010 by Natash*

**stats**

Suppose i am interested in the average price of books at a bookstore. i randomly pick 15 books.? i calculate the average of those, report my findings to the newspaper. can you identify the following: a. the population under consideration b. the parameter of intrest c. the ...
*January 17, 2011 by laura*

**maths-statistic**

A manufacturer wants to assess the proportion of defective items in a large batch produce by a particular machine. He tests a random sample of 300 items and finds that 45 items are defective. If 200 such tests are performed and a 95% confidence interval calculated for each, ...
*February 15, 2011 by shasha*

**statistic****help*******

Show all your work. Indicate clearly the methods you use because you will be graded on the correctness of your methods as well as on the accuracy of your results and explanation. A simple random sample of adults living in a suburb of a large city was selected. The age and ...
*March 19, 2014 by akiba*

**Statistic**

A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 of them. The fans booed. What is the probability of her missing 3 (or more) free throws out of 5? Set up and conduct a simulation (...
*January 29, 2014 by bowershe*

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