# random

4,702 results, page 22

According to a study conducted by a statistical organization, the proportion of americans who are satisfied with the way things are going in their lives is 0.82. Suppose that a random sample of 105 Americans is obtained. (Please answer the below and round

asked by LADO on December 3, 2014
2. ## math

A random digit dialing phone survey asked, how many of the last ten traffic lights you drove through were red. Of 880 respondents, 171 admitted at least one light had been red. What is likely direction of the bias: More or fewer than 171 really ran a red

asked by anonymous on March 31, 2013
3. ## hard probability question

four different written driving tests are administered by the MVD. on of these four tests is selected at random for each applicant for a drivers test. if a group consisting of two women and three men apply for a license, what is the probability that a.

asked by justin on February 24, 2009
4. ## math probability question

If a player rolls 2 dice and gets a sum of 3 or 11 he collects \$15. if he gets a sum of 12 he gets \$3. the cost to play the game is \$2. let x be the net money gained by the player. a. construct the prob distribution of the random variable x b. find the

asked by lily on October 14, 2015
5. ## Lincoln College Of New En

A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress. Use a = 0.10. a random sample of 100 men was selected and 10 said that they used exercise to relieve stress. Use the P –value method to test the claim.

asked by Paula on April 26, 2013
6. ## math

A bag contains 5 red balls and 7 green balls . A ball is picked at random , its color is noted and it is given out . The bag is shaken and a second selection is made. A. Draw. Tree diagram to illustrate thr information. B. Calculate the probability that

asked by Natasha on April 25, 2013
7. ## Statistics

You are a buyer bidding on a lot of 10,000 uncut diamonds. You select 100 stones at random, sight unseen, from the lot. The average weight is 0.98 ct with a standard deviation in the sample of 0.11 ct. What is the 95% confidence interval for the average

asked by Fran on March 4, 2010
8. ## Statisics

35%of adult Americans are regular voters. A random sample of 250 adults in a medium-size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your

asked by tina on October 6, 2011
9. ## maths

99. From a box containing 5 black marbles,8 pink marbles, 6 white marbles, and 5 yellow marbles, Kim removed 4 marbles,one of which was black.If she removes one more marble at random,what is the probability that it will be black? a. 1/6 b. 4/21 c. 1/5 d.

asked by thomas on October 10, 2014
10. ## statistics

Let x be a random variable that represents the length of time it takes a student to complete a take-home exam in Dr. Larson’s psychology class. After interviewing many students, it was found that x has an approximately normal distribution with mean µ =

asked by Anonymous on November 16, 2011
11. ## Math Help

According to statistics gathered as part of a research project by a group of statistics students on the college campus, 376 out of the 439 deaths attributed to lightning strikes were male. If all of the names of the deceased were placed into a drum and one

asked by Jamie on September 22, 2011
12. ## Math 120

The table shows the​ distribution, by​ age, of a random sample of 3990 moviegoers ages​ 12-74. If one moviegoer is randomly selected from this​ population, find the​ probability, expressed as a simplified​ fraction, that the moviegoer is not in

asked by Jessica on March 26, 2017
13. ## Math ---HELP!!!!!

One hundred people are selected at random and tested for colorblindness to determine whether gender and colorblindness are independent. The following counts were observed. Colorblind Not Colorblind Total Male 7 53 60 Female 1 39 40 Total 8 92 100 Find the

asked by angela on June 15, 2016
14. ## Math 120

The table shows the​ distribution, by​ age, of a random sample of 3990 moviegoers ages​ 12-74. If one moviegoer is randomly selected from this​ population, find the​ probability, expressed as a simplified​ fraction, that the moviegoer is not in

asked by Beth on March 19, 2017
15. ## Statistics

a Rollercoaster's auditors estimate that the average daily loss from those illegally riding without tickets is at lease (greater or equal) \$295, but wants to determine the accuracy of this statistic. The company researcher takes a random sample of losses

asked by Robert on November 1, 2014
16. ## Quantitative Analysis

To make meaningful causal inferences when conducting quantitative analyses, one must employ...? A. Dummy coding when using regression models B. Parametric methods of analysis robust in relationship to violation of basic assumptions C. T-Tests and Analysis

asked by Stacie on November 7, 2013
17. ## Math

Given any random, 3-digit number, what is the probability that a number will be: a) a multiple of 5 b) a multiple of 2 c) a square number How?

asked by Tiara on December 3, 2010
18. ## statistic

1.The state highway patrol stops every 5th car on highway 210 to check drivers' licenses and registrations. Which sampling technique are they using? systematic sampling -chose this one convenience sampling cluster sampling simple random sampling stratified

asked by bria on July 13, 2012
19. ## statistics

A card is to be chosen at random from a shuffled deck. Find the probability that the card drawn is a)the queen of clubs, given that it is an honor card. (I think it is a typo) b) a red four, given that the face number is even. c) a seven, given that the

asked by Anonymous on November 7, 2007
20. ## Algebra

The time a group of high school students arrive home from school each day was found to be normally distributed. The mean time was 3:15pm and the times had a standard deviation of 15 minutes. What is the probability that a student chosen at random arrives

asked by Jon on March 5, 2008
21. ## Statistics

When testing H0: σ12 = σ22 vs. Ha: σ12 ≠ σ22 two random samples of sizes 10 and 8, respectively, are used. The calculated value of the test statistic is found to be equal to 2.22. Which of the following statements is true? a. H0 must be rejected at

asked by Melanie on November 14, 2012
22. ## math

The tread life of a particular tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2000 miles. What is the probability that a randomly selected tire of this brand will last longer than

asked by Madison on September 18, 2010
23. ## statistics

the quality control inspector of a production plant will reflect a batch of syringes if two or more defectives syringes are found in a random sample of ten syringes taken from the batch of two percent defective syringes.what is the probability that the

asked by gaio on December 8, 2010
24. ## stats

This past summer the LifeSaving Society did a survey about who was at risk in the water, with the goal of reducing swimming accidents. (Globe and Mail July 15 2010) Consider a similar study done that shows that 96 % of those born in Canada can swim but

asked by az on October 2, 2010
25. ## random assignment-stats

Would this correctly result in random assignment? A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August,

asked by ash on March 2, 2009
26. ## random assignment-stats

Would this correctly result in random assignment? 1. A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August,

asked by ash on March 2, 2009
27. ## bio 12

you have an orginal populatonof eagles, then humans introduce new eagles in the same area. the new eagles reduce the amountof resources in its home range. what type ofdistrubtion would give the most accuarte assesment of sustainable maximum popualtion. the

asked by kelly on September 13, 2011
28. ## Math

Voting In a survey of 350 registered voters in belair,123 said that they would vote for the democratic candidate for mayor. if registered voter is selected at random, what is the probability that this person will vote for the democratic candidate.

asked by Daine on May 18, 2015
29. ## psychology

Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different.

asked by cindy on October 30, 2010
30. ## Probability

Erin's CD changer holds 6 compact disks. Justin uses the random function on to play all the songs randomly. If each of the disks on the changer holds 10 songs, what is the probability has favorite song will be first? If I am getting the hang of this, it's

asked by Ktowns on March 31, 2008
31. ## 6th grade math

We are learning probability and can you please check my answer. Question: Enrique has 3 dimes, 2 quarters, and 5 nickels in his pocket. He takes one coin from his pocket at random. What is the probability that the coin is either a dime or a nickel? My

asked by Kathy on March 22, 2009
32. ## statistics

A random sample of 20 hogs on farmer Brown's hog farm had an average weight of 350 pounds and a SD of 70 pounds. Find 95% confidence interval estimate of the mean weight of all farmer Brown's pigs.

asked by Lacey on December 9, 2010
33. ## math

at a grand opening of a store, every 3rd person is given a balloon, and every 7th person is given a \$5 coupon. if a person is selected at random from the first 100 people to shop there, whats the probability that the person will be given a balloon and a

asked by peter on June 28, 2010
34. ## psychology

Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different.

asked by cindy on October 31, 2010
35. ## statistics

The average teenager spends 7.5 hours per week playing computer and video games. In a random sample of 110 teenagers, what is the probability that their mean time for playing games is more than 8 hours per week?

asked by ron on November 2, 2011
36. ## Stats

A car rental agency currently has 43 cars available, 27 of which have a GPS navigation system. Two cars are selected at random from these 43 cars. Find the probability that both of these cars have GPS navigation systems. Round to four decimal places.

asked by Anonymous on October 21, 2013
37. ## statistics

A company has four production sections viz., S1, S2, S3 and S4 which contribute 30%, 20%, 28% and 22% of the total output. It was observed that those sections respectively produced 1%, 2%, 3% and 4% defective units. If a unit is selected at random and

asked by Harry on February 4, 2015
38. ## Check Answer!! math

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 7 14 11 32 Female 15 13 16 44 Total 22 27 27 76 If one student is chosen at random from those who took the test, Find the probability that the student was

asked by Anonymous on December 10, 2016
39. ## math

1) If 9 and 12 each divide Q without remainder, which of the following must Q divide without remainder? A)1 B)3 C)36 D)72 E)The answer can't be determined from the given info ^I got B 2) If mn does not equal 0, then 1/n^2 times (m^5n^3/m^3)^2 A)mn^4

asked by Aline on February 11, 2018
40. ## Statistics

a. In a random sample of 500 observations , we found the proportion of successes to be 48%. Estimate with 95% confidence the population proportion of successes. B. Repeat part (a) with N=200 C. Repeat part (a) with N=1000 I need to know how to do this in

asked by Christie on July 18, 2012
41. ## Statistics

There are 100 questions from a SAT test, and they are all multiple choice with possible answers of a,b,c,d,e for each question only one answer is correct. Find the mean number of correct answers for those who make random guesses for all 100 questions?

asked by Karen on February 13, 2014
42. ## statistics

A simple random sample of 1350 registered voters shows that 58% favor Candidate A over Candidate B. Construct a 99% confidence interval for the percent of the population of all registered voters who prefer Candidate A over Candidate B.

asked by justin on May 13, 2015
43. ## Algebra, Probability needed ASAP

1: A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. A). Find the theoretical probability of selecting a pink rubber

asked by ~NeedsABetterSchool~ on May 15, 2017
44. ## statistics

Help me! Population of heights of college students is approximately normally distributed with a mean of 64.37 inches and standard deviation of 6.26 inches A random sample of 74 heights is obtained. Find the mean and standard error of the x bar distribution

asked by anon on November 7, 2011
45. ## statistics

Lubbock, Texas ran a survey and determined that 27% of all households subscribed to the daily paper, 32% watched the evening news, and 9% did both. If a household is chosen at random, what is the probability that the evening paper was received or the news

asked by Kate on September 15, 2011
46. ## statistics

A transportation company wants to estimate the variance of the length of time goods are in transit across the country. A random sample of 20 shipments gives days and day. Give a 95% confidence interval for the variance of the transit time for all goods.

asked by ak on May 17, 2010
47. ## Geometry

A bag contains five pieces pf paper wit hthe emasures of various angles. The angle measures are 23,35,23,41,113. Suppose you pick 3 pieces of paper from the bag at random. What is the probability you can form an isosceles triangle with the three angles?

asked by Lisa on July 24, 2011
48. ## Elementary Statistics

There are 100 questions from an SAT test, and they are all multiple choice with possible answers of a,b,c,d,e. For each question, only one answer is correct, find the standard deviation for the numbers of correct answers for those who make random guesses

asked by Confused on April 11, 2014
49. ## math

A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. (this question is

asked by farahan on March 26, 2016
50. ## statistics

A simple random sample of a size n is drawn from a population that is normally distributed. The sample mean, x is found to be 110, and the sample standard deviation, s, is found to be 10. A- Construct a 95% confidence interval about u if the sample size,

asked by Anonymous on March 29, 2015
51. ## math

A magazine claims that 25% of its readers are college students. Of a random sample of 200 readers, 42 are college students. Use a .10 level of significance to test Ho: p =.25 and H1: p ≠ .25 Show the hypothesis test procedure.

asked by cristi on September 14, 2010
52. ## math

A nationwide survey showed that 65% of all children in the U.S. dislike eating vegetables. If three children are chosen at random, what is the probability that all three dislike eating vegetables? Write as a percent to the nearest tenth.

asked by Miki on May 13, 2014
53. ## statitics

a light bulb manufacture gaurentees that the mean life of a certain type of bulb is at least 875 hours. A random sample of 40 light bulbs has a mean life of 863 hours with a standard deviation of 50. a=0.04

asked by jamie on April 18, 2011
54. ## statistics

Please help. I have no idea what I am doing Use the standard normal (z score) table to find: P(-1.00 ≤ z) & Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following

asked by sharon on December 29, 2017
55. ## math

an insurance company reported that 55% of all automobile damage claims were made by people under age 25. If six automobile damage claims were selected at random, determine the probility that exactly four of them were made by someone under ager 25.

asked by EJ on May 17, 2014
56. ## statistics

One student is selected at random from a student body. Suppose the probability that this student is female is 0.5 and the probability that this student works part time is 0.6. Are the two events "female" and "working" mutually exclusive?

asked by nasta on October 6, 2010
57. ## math

A bag contains x marbles. Half of the marbles are blue. Four less than the number of blue marbles are red. The remaining marbles are purple. What is the probability of choosing a purple marble at random? a. 2 b. 4 c. 1/2-(x/2-4)/x d. x/2-4 e. x/2 please

asked by Tomas on October 25, 2013
58. ## statistics

Assume that we collect a large (n>30) simple random sample of annual incomes of adults in the United States. Because the sample is large, can we approximate the distribution of those incomes with a normal distribution ? Why or why not?

asked by Anonymous on March 6, 2013
59. ## Statistics

Assume that men constitute 49% of population in a country. Assume also that among men there are 5% of color-blinded. Find the proba- bility that a person chosen at random is a color-blinded man.

asked by Erica on November 14, 2008
60. ## Math

The standard deviation of test scores on a certain achievement test Is 11.3. If a random sample of 81 students had a sample score of 74.6 , find a 90% confidence interval estimate for the average score of all students.

asked by Rami on August 20, 2014
61. ## Math

A committee of 100 Democrats is formed with 22 members from the East, 38 members from the Midwest, and 40 members from the West. If a random sample of 3 members from this committee is selected, what is the probability to the nearest percent that all 3 are

asked by Ashleigh on February 12, 2015
62. ## statistics

The frequency of color blindness in the Caucasian American male population is about 8%. If a random sample of 125 individuals is chosen from this population, what is the probability that 5-10 individuals in the sample are color blind?

asked by Cheryl on March 21, 2013
63. ## Math

If a class has a population where 5% of the students have red hair and 12% have blonde hair, what's the probability that if we select one student at random that they'll have either red or blonde hair?

asked by Deborah on March 17, 2016
64. ## Statistics

In a survey, 55% of the voters support a particular referendum. If 30 voters are chosen at random, find the standard deviation of the number of voters who support the referendum.

asked by Jim on October 14, 2013
65. ## Math

Suppose an urn contains 8 red,5 white and 7 blue marbles.a.If 3 marbles are drawn at random from the urn with replacement,what is the probability that three marbles are red?

asked by Leonard on November 15, 2013
66. ## statistics

company A has 110 employed, company B has 750 employed and company C has 250 employed. Compute the probability that an employee selected at random comes from company A or B.

asked by iris on June 7, 2014
67. ## statistics

A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold.

asked by farahan on March 25, 2016
68. ## statistics

A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability of choosing a marble that is not blue?

asked by uos on March 10, 2017
69. ## Math

You have six \$1 bills, eight \$5 bills, two \$10 bills, and four\$20 dollar bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. What is P(\$1, then \$10)? A. 77/190 B. 3/100 C.3/95 D.2/5

asked by SchoolHelpNeeded on May 7, 2014
70. ## math

in his left pocket ralph has 4 quarters and 5 nickels. in his right pocket he has 3 quarters 2 nickels and 1 penny. if he wants to select a quarter at random, which pocket should he choose?

asked by Celeste on March 21, 2012
71. ## Math

A teacher is collecting data about students. Which of the following is a random sample. A.Students known by the teacher B.Students not known by the teacher C.Students using the library at lunch D.None of the answers are correct

asked by Anonymous on June 25, 2015
72. ## math

A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold

asked by farahan on March 26, 2016
73. ## Math &#128546;&#128546;&#128546;&#128546;&#128546; Help

Suppose a jar contains 5 red marbles and 33 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.

asked by Adam on October 2, 2016
74. ## word problem?

In a random survey, 8 out of 18 students Would rather go to an amusement park than to the zoo. In a group of 225 students, how many students can you expect to prefer the amusement park?

asked by nonononono on June 3, 2014
75. ## Math

A box contains 6 yellow, 5 violet & 3 pink chips. If 3 chips are tobe selected in random, what is the probability that the chips are composed of 2 violet or 1 pink?

asked by Anonymous on November 5, 2017
76. ## Math

A game has 30 cards numbered 1 through 30. e cards are shu ed. one card is picked at random. Find each probability. Which cards would give a probability of 1/10 they were picked.

asked by Amy on November 3, 2017
77. ## 7th grade math (probability)

1. Cmdr's coffee shop offers a coffee special with coffee syrups of vanilla, chocolate, and caramel. You can also choose between a latte, and cappuccino. How many different coffees can you make for the special? Ans: 6 (VLatte, ChocLatte, CLatte; VCap,

asked by Alexis on May 6, 2015
78. ## Math

1)let k and w be two consecutive integers such that k

asked by ANR on October 15, 2012
79. ## Statistics

Exam Grades. A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below.) At á = 0.05, can it be

asked by Gabriela on April 17, 2013
80. ## GEOMETRY

The squares of a 3×3 grid of unit squares are coloured randomly and independently so that each square gets one of 5 colours. Three points are then chosen uniformly at random from inside the grid. The probability that these points all have the same colours

asked by Anonymous on March 27, 2013
81. ## Psychology

Random assignment can be described as a research method: used to balance the independent and dependent variables. no longer used because of its unpredictability. increasing the likelihood that the experimental group and control group will be different.

asked by Chloe on March 14, 2011
82. ## 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

asked by gianna on April 27, 2016
83. ## 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

asked by Sabrina on July 27, 2015
84. ## statistics

The duration of time it takes General Motors to build a car is normally distributed with a mean of 31 hours and a standard deviation of 2 hours. a) What is the probability that a single car, selected at random, will take between 28 and 34 hours? b) What is

asked by kevin on April 25, 2013
85. ## statistics

Given that x is a normally distributed random variable with a mean of 60 and a standard deviation of 10, find the P(56 < x 56.)Please write your answer in a complete sentence.

asked by Rachel on July 24, 2012
86. ## Statistics

Suppose a random family of four is selected (two parents and two children). Suppose further that you are told one of the two children is a girl. Given that this family has at least one daughter, what is the conditional probability that it also has a son?

asked by Gary on April 20, 2015
87. ## statistics

4.90. Defective Equipment. A piece of electronic eqipment contains six computer chips, two of which are defective. Three chips are selected at random, removed from the piece of equipment, and inspected. Let x equal the number of defectives observed, where

asked by Anonymous on October 17, 2010
88. ## Algebra 2

In a quiz program, 3 questions on sprots, 3 questions on general knowledge, and 4 questions on science are printed separately on 10 cards and placed upside down. John is asked to select 2 cards at random. What is the probability of Joohn selecting 2

asked by Dena on January 30, 2012
89. ## hardware

the____is considered the brains of the computer? random access memory is ______? a printer can be considered a _____? lasres, ink jets and dot matrix are types of___________? monitersand printers are types of _____? floppy diskettes are also called _____?

asked by katie on August 15, 2008
90. ## Stats.

The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between

asked by Christina on March 18, 2013
91. ## probability

3. A bag contains five different lightbulbs. The bulbs are the same size but each has a different wattage. If you select three bulbs at a random,how many different outcomes will be in the sample space if the bulbs are selected without replacement? I

asked by bria on July 15, 2012
92. ## math

My couch potato friend enjoys sitting in front of the TV and grabbing handfuls of 4 chocolates at random from his snack jar. Unbeknownst to him, I have replaced one of the 18 chocolates in his jar with a cashew. (He hates cashews with a passion.) How many

asked by LC on November 29, 2010
93. ## ap statistics

What would the null and alternate hypothesis be for this problem? The manager at Air Cargo feels that the weights of packages shipped recently are less than in the past. Records show that in the past packages have had a mean weight of 36.7 lb. and a

asked by emma on April 26, 2014
94. ## Math Help

Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

95. ## Business statistics

An accounting firm recently stated: "The client's mean sales per customer is estimated to be between \$14.50 and \$28.50. Further this estimate is based on a random sample of 100 customers and was computed using 95% confidence. Discuss the appropriateness of

asked by Huntsville33 on August 3, 2007
96. ## statistics

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

asked by Monique on October 31, 2011
97. ## MATH

Can someone please HELP me figure this out? According to statistics gathered as part of a research project by a group of statistics students on the college campus, 376 out of the 439 deaths attributed to lightning strikes were male. If all of the names of

asked by Shelly on September 24, 2011
98. ## math

Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens