# random

4,702 results, page 18-
## 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?

*asked by Nancy on April 4, 2012* -
## statistics

random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a. what is the probability that the sample mean will have a value between 45 and 55? b. what is the probability that the sample

*asked by angela on October 15, 2012* -
## 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?

*asked by Nancy on April 7, 2012* -
## Statistics

In a certain population the heights of men are normally distributed with mean 168.75 and variance 42.25 those of women are normally distributed with mean 162.50 and variance 36 the probability that the mean height of a random sample of 25 men is less than

*asked by Malambo on April 13, 2017* -
## statistics

12 light bulbs are tested to see if they last as long as claimed. 3 of them fail. 2 light bulbs are selected at random without replacement. find the probablility that at least one of the 2 selected failed the test.

*asked by Mark on October 8, 2010* -
## MATH

A quiz consists of 90 multiple-choice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guesses for all of the answers, find the probability of getting A as right answer. A is the correct answer for all the questions

*asked by ANUP on July 18, 2016* -
## MATHS STATISTICS

A. According to an estimate, 50% of the people in the United States have atleast one credit card. If a random sample of 30 persons is selected, what is the probability that 19 of them has atleast one credit card? PLIZ REALLY NEED HELP!! THANKS VERY MUCH..

*asked by DON on May 14, 2013* -
## Pre-Calc

Three cards are chosen at random from a standard 52-card deck. Find the probability that all three cards are hearts given that there are 13 hearts in the deck. Round to the nearest thousandth. Is this 0.013?

*asked by Anonymous on May 22, 2016* -
## math

In a box filled with 60 colored chips, 1/6 are blue, 1/2 are white, 1/4 are yellow, and 1/2 are purple. Find the probability of picking at random a purple chip or a white chip?

*asked by Anonymous on May 25, 2016* -
## statistics

A box of tickets averages out to 75 and the SD is 10. One hundred draws are made at random with replacement from this box. a)Find the chance that the average of the draws will be in the range 65 to 85. b)repeat for the range 74 to 76.

*asked by Amanda on October 28, 2008* -
## Statistics

Suppose that 50% of people frequently exceed the speed limit. A random sample of 2000 people is surveyed and 55% indicate that they frequently speed. What is the value of the population percent given to you in the problem?

*asked by Mea on April 9, 2014* -
## Statistics

A recent survey found that 72% of all adults over 50 wear glasses for driving. In a random sample of 100 adults over 50, what is the mean and standard deviation of the numbe who wear glasses?

*asked by Sheila on March 29, 2012* -
## math

there are 3 miniature chocolate bars and 5 peaunt butter cups in a candy dish. judie chooses 2 of them at random. What is the probablity that both she chooses 2 miniature choclate bars?

*asked by amanda on February 25, 2010* -
## statistics

A sample of 100 iron bars is said to be drawn from a large number of bars. Whose lengths are normally distributed with mean 4 feet and S.D 0.6ft. If the sample mean is 4.2 ft, can the sample be regarded as a truly random sample?

*asked by Sankar on July 17, 2013* -
## algebra

Four marbles are drawn at random from a bag containing 7 black marbles and 10 red marbles. Determine the number of outcomes in the sample space of this experiment if the marbles are drawn without replacement.

*asked by ally on September 29, 2011* -
## Math

There are 4 queens in a standard deck of 52 cards. You pick one card at random. What is the probability of not picking a queen? This one is a bit confusing. 4/52=1/13 is the probability of picking a queen. I am not sure how to figure this one out.

*asked by Patrick on March 28, 2018* -
## algebra 2

A newspaper claims that 52% of voters will vote for a particular candidate in an upcoming election. A random survey of 1000 voters shows that 48% will vote for that candidate, with a standard deviation of 3%.

*asked by george on August 1, 2014* -
## Statistics

A particular fruit's weights are normally distributed, with a mean of 353 grams and a standard deviation of 6 grams. If you pick one fruit at random, what is the probability that it will weigh between 334 grams and 344 grams?

*asked by Daniel on May 4, 2015* -
## math

Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability that two or three of the balls are white. (Round your answer to three decimal places.)

*asked by Anonymous on February 27, 2011* -
## Algebra

A store received an order of 50 shirts. 20 of the shirts are blue. If one shirt is chosen out of the 50 at random, what is the probability the shirt will not be blue? Give answer as a percent. Can someone tell me how to solve this?

*asked by |-/ on April 25, 2018* -
## psychology

The use of blind or double-blind investigators in a study is done to avoid: sampling error. sample bias. uncontrollable variables. researcher bias. random error.

*asked by andrew on October 7, 2018* -
## Probability

Statistics show that about 5% of all males are colorblind. Suppose that 20 males are selected at random. What is the probability that at least 4 of the 20 people are colorblind? My answer: I got 1-0.984 The answer key says 0.00257394

*asked by Anonymous on March 1, 2014* -
## statistics

A random sample of 84 shoppers were interviewed and 51 said they prefer to shop alone rather than with someone else. Let p represent the proportion of all shoppers at this mall who would prefer to shop alone. Find a point estimate (p hat) for p.

*asked by Anonymous on November 3, 2014* -
## PRE-CALC

A biased coin has a 0.4 probability of landing on tails. The random variable X, based on a single toss of the coin, is defined as follows: X = 0 if heads appears; X = 1 if tails appears. What is the mean value of X? A) 0.7 B) 0.5 C) 0.4 D) 0.3 E) 0.6

*asked by Anonymous on March 24, 2014* -
## Statics

A random sample of 100 cans of peaches has an observed mean weight of 48.5 ounces and a standard deviation of 2.4 ounces. Determine the lower limit of the 95% interval for the true mean weight. The can label says that the can weights 48 ounces. Comment on

*asked by Heather on December 1, 2012* -
## statistics

The height of 18-year-old men are approximately normally distributed, with mean of 68 inches and a standard deviation of 3 inches. What is the probability that an 18-year-old man selected at random is between 67 and 69 inches tall? Round your answer to the

*asked by kinshassa on July 22, 2011* -
## arithmetic

Assume you roll a fair dice twice. Two rolls are independent and identically distributed, with probability of rolling a particular number being 1/6. So, for instance, the probability of rolling 5 and then 2 is P(5,2) = P(5) ⋅ P(2) = 1/6 ⋅ 1/6 = 1/36

*asked by Anonymous on June 2, 2013* -
## Math

Having trouble knowing where to start with this one: A maker of tools claims the average amount of time it takes to assemble a table saw is 50 mins with a standard deviation of 40 mins. What is the probability that the sample mean will be less than 44 mins

*asked by Len on March 23, 2010* -
## statistics

A simple random sample size of n = 150 is obtained from a population whose size is N = 20,000 and whose population proportion with a specified characteristic is p = 0.6. What is the probability of obtaining x = 96 or more individuals with the

*asked by jen on March 30, 2013* -
## Algebra 2

Suppose the experimental probability is 1/3 that a carton of eggs contains at least one broken egg. Use the simulation of 20 trials to find the experimental probability that 3 cartons selected at random contain only unbroken eggs.

*asked by bc on November 3, 2010* -
## statistics

A bag cntains 100 bolts nd 300 nuts 50% f each hv been rusted 1 item z chosen at random. Find da probability dat chosen item z rusted or a bolt.

*asked by Anonymous on October 5, 2010* -
## Math

A box contains 4 red cubes, 3 blue cubes, 2 green cubes, and 1 yellow cube. You pick two cubes at random, replacing each after you pick. Find the probability of each compound event.

*asked by Mary on May 2, 2012* -
## computers

how do i upgrade the bytes on a computer? Do you mean adding memory? That's referred to as adding RAM (random access memory). Wherever you bought your computer, there will be people who can help you decide what to buy and maybe even install it for you. =)

*asked by rickie on February 22, 2007* -
## Math

a bag contains 5 blue, 4 red, 9 white, and 6 green marbles. I f a marble is drawn at random and replaced 100 times, how many times would you expect to draw a green marble?

*asked by Mia,Thank you on February 13, 2013* -
## maths

there are 8 red, 6 green, 10 blue marbles in a bag. A child keeps picking a ball at random and all marbles are equally likely to be picked. calculate the probability of picking a red marble

*asked by pretty on November 8, 2016* -
## Math : Statistics

A box contains seven candies, four of which are green, and three of which are blue. You select one piece at random, then without replacing the first one, you select another. If P(BG) is the probability of selecting a blue first and a green second, find the

*asked by Keonn'a on October 13, 2018* -
## Probability

2/3 people at a spa are there to lose weight. There are 10 people there and I approach one. What is the probability that the person is there to lose weight? The random variables are based on 10 rolls of a dice. 1(1)+ 2(2)+ 3(1)+ 4(2)+ 5(1)+ 6(3)

*asked by kathy on March 8, 2013* -
## Math-Probability

Michael is one of eight contestants entered in three races to be run on a eight-lane track. If in each race the runners are assigned to the lanes at random, what is the probability that Michael will be assigned to the inside lane at least once?

*asked by Emma on March 17, 2012* -
## STATISTICS HELP PLEASE!

suppose you wish to estimate a population mean based on a random sample of n observations, and prior experience suggests that sd=12.7. if you wish to estimate the mean correct to within 1.6, with probability equal to .95, how many observations should be

*asked by Courtney on November 16, 2010* -
## Stats

A pizza parlor has 13 different toppings available for its pizzas, and 2 of these toppings are pepperoni and anchovies. If a customer picks 2 toppings at random, find the probability that pepperoni is one of the toppings. Round to four decimal places.

*asked by Anon on July 18, 2013* -
## math probability

A box has ten dollars, one is five dollar and four of one dollars. If two bills are chosen at random without replacement, find probability of getting A) amount of valued fifteen dollars B) amount of twelven dollars... is it 4 from 19-15 for A and 7 from

*asked by sandy on November 14, 2014* -
## math

Fifty students were surveyed about their favorite food. A student is selected at random. Based on the survey results, what is the probability that this student will choose Taco as their favorite food?

*asked by Dionne on January 29, 2013* -
## Algebra 2

suppose the experimental probability is 1/3 that a carton of eggs contains at least one broken egg. Use a stimulation of 20 trials to find the experimental probability that three cartons selected at random contain only unbroken eggs.

*asked by Liliya on September 10, 2015* -
## Statistics

A random sample of 60 riders waited in line a mean time of 42 minutes with standard deviation 12 minutes. Find a 90% confidence interval for the populationmean waiting time in line

*asked by Lost37 on March 21, 2013* -
## statistic

1. Past experience indicates that the variance, ¦Ò2x, of the scores, X, obtained on the verbal portion of a test is 5,625. Similarly, the variance ¦Ò2y, of the scores, Y, on the mathematical portion is 2,500. (a) A random sample of size n = 64 yields a

*asked by Tian on January 30, 2011* -
## finite math

An urn contains 4 red, 6 white, and 3 blue marbles. Three marbles are selected at random and without replacement. What is the probability that one of each color is selected? Give your answer as a decimal number, with 3 decimal places.

*asked by amelia on February 22, 2015* -
## stats

A simple random sample of 30 items resulted in a sample mean of 15. The population standard deviation is σ = 8. Round your answers to two decimal places. a. What is the standard error of the mean, σx? b. At 95% confidence, what is the margin of error?

*asked by Anonymous on April 23, 2016* -
## math

In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points. Find the interval about the sample mean such that the probability is 0.90 that the mean number lies within the interval.

*asked by King on May 25, 2012* -
## algebra

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 12 8 3 23 Female 19 18 4 41 Total 31 26 7 64 If one student is chosen at random, Find the probability that the student was NOT a male that got a "A"

*asked by rosia on May 8, 2018* -
## Math

An executive committee consists of 11 members: 5 men and 6 women. 3 members are selected at random to attend a meeting in Hawaii. The names are drawn from a hat. What is the probability that all 3 selected are women? Thanks for the help

*asked by kim on October 8, 2015* -
## algebra

A spinner with 10 equally sized slices . The dial is spun and stops on a slice at random. What are the odds in favor of landing on a white slice when white has 7 slices. 2 black and 1 grey

*asked by djd on August 22, 2015* -
## Statistics

Answer the question Yes or No. Sam computed a 90% confidence interval for from a specific random sample of size n. He claims that at the 90% confident level, his confidence interval does not contain . Is this claim correct? Answer a. No b. Yes

*asked by Desperate on July 7, 2012* -
## Math

A bag contains 5 blue, 4 red, 9 white, and 6 white marbles. If a marble is drawn at random and replaced 100 times, how many times would you expect to draw a green marble? Answer: 12/50

*asked by Tom on January 15, 2014* -
## Statistics

A box contains four balls labeled 1,2,3,4 respectively. Two balls will be sequentially selected from the box at random without replacement. Let Y1 be the maximum of two outcomes and Y2 be the minimum of two outcomes observed. Find the joint probability

*asked by Ed on February 10, 2012* -
## MATH

NEIL'S SOCCER TEAM CONSISTS OF 8 SOPHOMORE MEMEBERS, 14 JUNIOR MEMBERS, AND 10 SENIOR MEMBERS. IF ONE MEMBER IS SELECTED AT RANDOM TO ACT AS CAPTAIN, WHAT IS THE PROBAABILITY THAT THE CAPTAIN WILL NOT BE A SOPHOMORE?

*asked by Anonymous on January 17, 2014* -
## statistics

Suppose that the population standard deviation (ó) for a normally distributed standardized achievement test (ACT) is 6. What would the standard error of the sample mean (óxbar) be if we were to draw a random sample of 36 test scores?

*asked by Anonymous on October 4, 2011* -
## Math

A weather forecast states that there is a 20% probability of rain on each of the next 3 days. Describe a simulation you could perform using random numbers to find the experimental probability that it will not rain on any of the next 3 days. Would love

*asked by Anonymous on April 6, 2017* -
## Probability Help ASAP!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Amanda on October 1, 2016* -
## MATH HELP ASAP

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 18 16 8 42 Female 7 17 9 33 Total 25 33 17 75 If one student is chosen at random, Find the probability that the student was NOT a female that got a "A"

*asked by Amanda on October 1, 2016* -
## Math Help!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Anonymous on October 1, 2016* -
## Math Help!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Anonymous on October 1, 2016* -
## statistics!

The following data represents the body mass index in a random group of twelve diabetic patients in a clinic. 18, 28, 31, 14, 25, 21, 22, 28, 35, 29, 27, 22. What is the z score of the person with the lowest and highest body mass index?

*asked by joane on October 25, 2012* -
## English

Where can I go to check about my essay when your are finished? I have not seen any essay from you for help with proofreading. If you post the entire essay in a message, someone will respond directly to that message. =) I need your help to write that

*asked by louise on November 30, 2006* -
## Statistics

Bill,mary,and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible? How many of these committees will contain Bill,Mary, and Joe at the same time?

*asked by Charles on September 29, 2016* -
## Statistics

Bill, Mary, and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible. How many of these committees will contain Bill, Mary and Joe at the same time?

*asked by Charles on September 29, 2016* -
## Probability and Statistics

The ACT scores of applicants to college are approximately normally distributed with a mean of 20.3 and a standard deviation of 3.1. If a random sample of 20 applicants to college is chosen find the probability that their average ACT score will be 19 and

*asked by Kim on April 30, 2012* -
## statistics

once again I am not getting this. assume that the population of heights of male college students is normally distibuted with a mean of 69.09 and standard deviation of 4.71. A random sample of 92 heights is obtained. find the mean and standard error of the

*asked by denise on September 19, 2011* -
## statistics

The number of defects in a random sample of 200 parts produced by a machine is binomially distributed with p = .03. Based on this information, the expected number of defects in the sample is 6. Is it True or False?

*asked by joe on October 13, 2010* -
## Statistics

Suppose x is the waiting time at a bank, which is a random variable that is uniformly disturbed on values between 0 and 20 minutes. Find the probability that the waiting time is between 5 and 10 minutes.

*asked by Joshia Norman on April 5, 2018* -
## stats.

The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?

*asked by Christina on March 18, 2013* -
## stats.

The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?

*asked by Christina on March 18, 2013* -
## Probability and Statistics

Random Variables X and Y follow a joint distribution: f(x,y)=(6-x-y)/8 if 0

*asked by Katy on November 1, 2013* -
## statistics

In a random sample of 400 electrical components,100 are found to be defective.if the hypothesis is that 20% of the components are defective,what is the standard error of the sample proportion

*asked by sharon on March 13, 2011* -
## Math

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*asked by Elizabeth on November 1, 2013* -
## science

1 Which do you think is more effective and why? - Gathering a lot of data or - Gathering a random sample of data? 2 How does this study compose to scientists who study the structure of the atom or evolution?

*asked by Kaity on September 16, 2008* -
## Probability

Suppose a random variable X has a cumulative distribution function given by F(a) = {0 for a

*asked by Julie on January 22, 2009* -
## 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.

*asked by Morena on March 19, 2013* -
## Probability and Statistics

Random Variables X and Y follow a joint distribution: f(x,y)=(6-x-y)/8 if 0

*asked by Katy on November 2, 2013* -
## maths

urn contains 4 white and 6 red rolls. Four balls are drawn at random (without replacement) from the urn. Find the probability distribution of number of white balls?

*asked by Anonymous on February 19, 2013* -
## Probability

Suppose a random variable X has a cumulative distribution function given by F(a) = {0 for a

*asked by Julie on January 22, 2009* -
## Math

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

*asked by Shadow on February 18, 2010* -
## Math

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

*asked by Shadow on February 18, 2010* -
## math

A bag contains 100 bolts and 300 nuts 50% of each have been rusted 1 item is chosen at random. Find the probability that chosen item z rusted or a bolt.

*asked by rehan on October 5, 2010* -
## Statistics

Selecting a letter of the alphabet: If 3 letters of the alphabet are selected at random, find the probability of getting at least one letter "x". Letters can be used more than once. My answer was: P(at least 1 "x) = 1 - (25/26)^3 = 1951/17576 or 0.11 Is

*asked by Anonymous on February 21, 2014* -
## Probability and Satistics

Random Variables X and Y follow a joint distribution: f(x,y)=(6-x-y)/8 if 0

*asked by Katy on November 2, 2013* -
## Math

how would you go about this question? a 12 inch by 14inch rectangular cake is divided into 2 inch squares. if your piece is chosen at random what is the probability that my piece is chosen from the outside edge?

*asked by Mackenzie on January 28, 2008* -
## Math

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*asked by Elizabeth on November 2, 2013* -
## stat

In a random sample of 200 registered voters, 150 indicated they are Democrats. Develop a 99% confidence interval for the proportion of registered voters in the population who are Democrats.

*asked by nancy on April 17, 2017* -
## Statistics

. Two cards are drawn at random, without replacement, from a standard 52-card deck. Find the probability that: (a) both cards are the same color (b) the first card is a face card and the second card is black

*asked by Joan on April 20, 2016* -
## Maths

During a survey 25 out of the 40 learners in a class indicated that they own a cellphone .Two learners are selected at random from the class the first not being replaced before the second is selected. Draw a tree diagram that shows the possible outcomes

*asked by Yamkela magagasi on September 15, 2017* -
## ggc

In a random sample of 200 registered voters, 120 indicated they are Democrats. Develop a 95% confidence interval for the proportion of registered voters in the population who are Democrats.

*asked by Nicole Jones on July 21, 2013* -
## math

Suppose that 28 crayons, of which four are red, are divided random among Jack, Marty, Sharon, and Martha (seven each). If Sharon has exactly one red crayon, what is the probability that Marty has the remaining 3?

*asked by rita on February 7, 2011* -
## probability theory

Let X, Y, Z, be independent discrete random variables. Let A= X(Y+Z) and B= XY With A, B, X, defined as before, determine wheter the folllowing statements are true or false. 1. A and B are independent 2. A and B are conditionally independent, given X = 0.

*asked by P on October 7, 2018* -
## Math

A 3-digit positive integer is selected at random. Find the probability that A) The last two digits of the number is 22 B) The number is greater than 900 C) The number is less than 100 D) The number contains at least one digit 8

*asked by Ledyyyy on February 14, 2016* -
## MATH

A STUDENT COUNCIL COMMITTEE IS MADE UP OF 4 BOYS AND 5 GIRLS.IF 2 COMMITTEE MEMBERS ARE CHOSEN AT RANDOM TO ATTEND A CONFERENCE,WHAT IS THE PROBABILITY THAT BOTH MEMBERS WILL BE BOYS?

*asked by ALEXIS on May 5, 2013* -
## math

In a shop there are 20 customers, 18 of whom will make a purchase. If three customers are selected, one at a time, at random, what is the probability that all will make a purchase? 0.7717 0.7157 0.8524 0.8808

*asked by bell on November 19, 2009* -
## math

The sale force of a business consist of 10 men and 10 women A production unit of 6 people is set up at random what is the probability that it will consist of 4 men and 2 women

*asked by rita on July 3, 2014* -
## Math

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*asked by Elizabeth on November 2, 2013* -
## Algebra

A bowl contains 10 jellybeans (4 red, 1 blue, and 5 white). If you pick 3 jellybeans from the bowl at random and without replacement, what is the probability that exactly 2 will be red? Express in a common fraction.

*asked by Cassie on April 7, 2009* -
## Math

Assume that you select 2 coins at random from 5 coins: 3 dimes and 2 quarters. What is the probability that all of the coins selected are dimes?

*asked by Kelly on February 16, 2012*