random

4,731 results, page 3
  1. algebra

    Which of the following are examples of inferential statistics? Check all that apply. A.Finding the average (mean) of a set of numbers B.Testing every lightbulb produced by a company to confirm that each one works C.Testing random samples of lightbulbs

    asked by daryl on April 18, 2012
  2. Statistics

    1. In thinking about doing statistical analysis, the sample mean should be interpreted as: A.)a constant value that is equal to the population mean. B.) a constant value that is approximately equal to the population mean. C.) a random variable that is

    asked by Sara on May 3, 2011
  3. Research Methods

    A researcher wants to attain a random sample of young drivers who have received DUIs within the last year. Using the PREP system, he asks all first year students at WLU who have received a DUI to volunteer for the study. Thirty-five students actually admit

    asked by Jill on October 15, 2011
  4. english answer check please, 4 questions

    1. To plan your time for a research project, it is best to (1 point) divide the time spent on each step evenly. keep your deadlines flexible. start at the beginning and plan from there.***** work backward. 2. Which of the following is not a guideline for

    asked by Anonymous on March 15, 2017
  5. statistics

    Professor Smith conducted a class exercise in which students ran a computer program to generate random samples from a population that had a mean of 50 and a standard deviation of 9mm. Each of Smith's students took a random sample of size n and calculated

    asked by lauren on February 16, 2008
  6. statistics

    The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable. Find the probability that one student selected at random is older than 23. Find the probability that the mean

    asked by DezShonna K on June 12, 2010
  7. probability

    There are 100 people in line to board a plane with 100 seats. The first person has lost his boarding pass, so he takes a random seat. Everyone that follows takes their assigned seat if it's available, but otherwise takes a random unoccupied seat. What is

    asked by unowen on November 23, 2017
  8. probability

    If 2 cards are drawn at random from a standard deck of cards with no replacement, find the probability that both cards are heart I had 13/52 multiplied by 12/51 to get an answer of 1/17 A bucket contains 4 red, 2 yellow, and 3 green balls. If one ball is

    asked by Jane on May 15, 2008
  9. probability

    This figure below describes the joint PDF of the random variables X and Y. These random variables take values in [0,2] and [0,1], respectively. At x=1, the value of the joint PDF is 1/2. (figure belongs to "the science of uncertainty) 1. Are X and Y

    asked by RVE on February 28, 2015
  10. Statistics

    A recent study was designed to compare smoking habits of young women with those of young men. A random sample of 150 women revealed that 45 smoked. A random sample of 100 men indicated that 25 smoked. At the 0.05 significance level does the evidence show

    asked by Brenna on October 30, 2009
  11. Math

    Four hundred people apply for three jobs. 130 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women? (Round the answer to six decimal places.) (b) If three persons are selected at random, what

    asked by Marla on February 4, 2010
  12. Statistics

    A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution

    asked by Alex on June 20, 2010
  13. Probability

    Let Θ be an unknown random variable that we wish to estimate. It has a prior distribution with mean 1 and variance 2. Let W be a noise term, another unknown random variable with mean 3 and variance 5. Assume that Θ and W are independent. We have two

    asked by qwerty on April 21, 2015
  14. math

    Andre picks a card at random. Without putting the first card back, he picks a second card at random. What is the probability that both cards will be hearts. The cards showing are three hearts and two diamonds

    asked by Olivia on May 8, 2014
  15. statistics

    Women’s heights are normally distributed with a mean of 162 cm and standard deviation of 16 cm. a. Define an random variable, X, and describe its full distribution including the mean and variance. b. What percentage of heights are greater than 180 cm ?

    asked by Jasmine on December 5, 2011
  16. probability

    The PDF of exp(X) Let X be a random variable with PDF f_X. Find the PDF of the random variable Y=e^X for each of the following cases: For general f_X, when y>0, f_Y(y)= f_X(ln y) --------- y When f_X(x) = {1/3,0,if −2

    asked by RVE on March 26, 2015
  17. math

    a bag contains 6 blue marbles and 10 red marbles. If you choose one marble at random, and then another marble at random, what is the probability that both marbles are blue?

    asked by carol on July 22, 2016
  18. math prob

    It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the

    asked by hsuan on May 4, 2013
  19. math

    It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the

    asked by hsuan on May 3, 2013
  20. math

    It is known that the number of people who enter a bank during a time interval of t minutes is a Poisson random variable with the parameter t. The bank opens at 8am and you arrive at the bank at uniformly random time between 8am and 9am. Let X be the

    asked by hao on May 3, 2013
  21. MATH

    A jar contains 10 green, 6 white, and 11 brown marbles. A marble is drawn at random. P(brown or white) I think 17/27 A number from 16 to 28 is drawn at random. P(an even number) I think 7/13

    asked by Anonymous on March 13, 2014
  22. math0

    If you pick a gumball at random, put it back, and then pick another gumball at random, what is the probability of picking a blue gumball then picking a yellow gumball?

    asked by Anonymous on April 21, 2016
  23. math

    Please help with this question. A bag contains 10 marbles of which 3 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

    asked by jackie on July 31, 2010
  24. Probability

    Let U, V, and W be independent standard normal random variables (that is, independent normal random variables, each with mean 0 and variance 1), and let X=3U+4V and Y=U+W. Give a numerical answer for each part below. You may want to refer to the standard

    asked by qwerty on April 21, 2015
  25. social psy

    I want to utilize a true experimental design to study the effects of classical music exposure on the cognitive development of newborns. a- What is an independent variable? b- What is a dependent variable? c-What is random assignment? d-Why is random

    asked by deb on October 3, 2011
  26. 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

    asked by meri on June 30, 2015
  27. statistics

    please help me on this; In the mass production of bolts it is found that 5% are defective. Bolts are selected at random and put into packets of ten. A packet is selected at random. Find the probability that it contains: A. no defective bolts, B. three

    asked by uta on April 13, 2016
  28. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra on June 11, 2013
  29. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by anonymous on June 14, 2013
  30. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra on June 13, 2013
  31. maths

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra on June 14, 2013
  32. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra on June 12, 2013
  33. math

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by raja harishchandra on June 13, 2013
  34. math

    A bag contains 5 red and 4 green apples. Michael takes one apple at random from the bag. His sister Ashley then takes an apple at random from he bag. What is the probability that the two apples are the same colour? Can you explain to me how to do this

    asked by Anna on February 8, 2015
  35. statistics

    A die has 2 red faces, 2 blue faces, and 2 green faces. It is rolled 240 times. Let R be the number of times red faces appear, and B the number of times blue faces appear. The random variable R is the sum of 240 draws at random with replacement from [pick

    asked by gerd on May 18, 2013
  36. Stats

    I just need help with starting how to calculate the problem I am so lost. A random sample of eight observations from the first population resulted in a standard deviation of 10. A random sample of six observations from the second population resulted in a

    asked by Yasmin on December 6, 2010
  37. Stats

    Describe how to use a source of random data to simulate multiple trials of this situation. A student guesses on all 10 questions of a multiple-choice quiz. Each question has three choices. a. Assign 00-09 to all of the correct answers and 10-29 for all the

    asked by Bailey on July 29, 2016
  38. stats

    Consider an infinite population with 25% of the elements having the value 1, 25% the value 2, 25% the value 3, and 25% the value 4. If X is the value of a randomly selected item, then X is a discrete random variable whose possible values are 1, 2, 3, and

    asked by Mischa on November 6, 2008
  39. math

    is this correct? 1.a jar contains 5 white, 15 violet,and 21 blue marbles. a marble is drawn at random. P(violet or white) answer: 5x15x21= 1575 15x5=75 75/1575= 1/21 2. a number from 10 to 16 is drawn at random. P(a number greater than 14) answer: 2/7

    asked by Jane on April 8, 2010
  40. Probability

    You have a 4-card deck containing a queen, a jack, a 10, and a 9. You draw a random card, put it back, and draw a second random card. Use a tree diagram to calculate the probability that you draw exactly 1 face card (a queen or a jack). A. 1/2. B. 7/16. C.

    asked by so confused! on May 8, 2013
  41. statistics

    A researcher finds that two continuous, random variables of interest, X and Y, have a joint probability density function (pdf) given by: f(x,y)={cxy 0

    asked by lee on November 13, 2014
  42. statistics

    A researcher finds that two continuous, random variables of interest, X and Y, have a joint probability density function (pdf) given by: f(x,y)={cxy 0

    asked by sana on November 13, 2014
  43. Probability

    In the following problem, please select the correct answer. Let X be a non-negative random variable. Then, for any a>0, the Markov inequality takes the form P(X≥a)≤(a^c)E[X^5]. What is the value of c? c= unanswered Suppose that X_1,X_2,⋯ are random

    asked by AnonStar on March 16, 2018
  44. econ 112

    A random sample of 400 morning shoppers showed that 130 were men. A random sample of 480 evening shoppers showed 187 to be men. Use a 5% level of significance to test for a significant difference in the proportion of morning and evening male shoppers. What

    asked by Anonymous on June 28, 2013
  45. maths : probability

    We are given a biased coin, where the probability of Heads is q. The bias q is itself the realization of a random variable Q which is uniformly distributed on the interval [0,1]. We want to estimate the bias of this coin. We flip it 5 times, and define the

    asked by Anonymous on December 19, 2018
  46. maTH

    I NEED HELP REALLY BAD 5. Directions: Select all the correct answers. Nancy is studying constellations in science class. Two things are strongly supported by all random samples of the number of stars in a constellation. Most constellations have from three

    asked by Babatunde on May 9, 2014
  47. stastic

    A can of Coke is supposed to contain, on the average, 16 ounces of soda with a standard deviation of 0.4 ounces. Suspecting fraud, you take a random sample of 50 cans and measure the amount of Coke in each. Your measurements show that the 50 cans had a

    asked by kima on April 18, 2014
  48. Statistic

    1. For this assessment, explicityly state the five steps of a simulation and carry out the simulation. Use the random digit table. A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of

    asked by Helen on January 30, 2014
  49. Stats

    The random variable U has mean 10 and standard deviation 5.The random variable V is de ned by V =12(U + 5).Find the mean and standard deviation of V.

    asked by Sunny on November 20, 2013
  50. Applied Stats

    Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that they have hypertension

    asked by Anonymous on August 8, 2016
  51. math

    A basket contains 11 pieces of fruit: 4 apples, 5 oranges, and 2 bananas. Jonas takes a piece of fruit at random from the basket, and then Beth takes a piece at random. What is the probability that Jonas will get an orange and Beth will get an apple?

    asked by stephanie on October 13, 2011
  52. algebra

    A basket contains 11 pieces of fruit: 4 apples, 5 oranges, and 2 bananas. Jonas takes a piece of fruit at random from the basket, and then Beth takes a piece at random. What is the probability that Jonas will get an orange and Beth will get an apple?

    asked by den on January 21, 2011
  53. math

    A bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

    asked by babygirl on March 9, 2010
  54. Algebra

    a bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

    asked by Joe on July 23, 2009
  55. Math probability

    A bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

    asked by nicole on April 11, 2010
  56. Maths A

    For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range

    asked by Anna on February 25, 2013
  57. math - classifying events

    A market survey has estimate that the probability of a household's subscribing to the following magazines is: Reader's Digest - 0.6 Chatelaine - 0.5 Maclean's - 0.4 Reader's Digest and Chatelaine - 0.2 Reader's Digest and Maclean's - 0.2 Chatelaine and

    asked by CL on May 6, 2010
  58. math

    A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?

    asked by Melanie on May 21, 2012
  59. stats

    A random sample of 50 households in community A has a mean household income of X =Rs. 44,600 with a standard deviation s =Rs. 2,200. A random sample of 50 households in community B has a mean of X = Rs. 43,800 with a standard deviation of Rs. 2,800.

    asked by Anonymous on June 20, 2014
  60. statistics

    Scores on a national writing exam are approximately normally distributed, with a mean of 490 and a standard deviation of 20. Consider random samples of size 25 from the population of test takers. describe the sampling distribution of a sample mean. shape

    asked by ivan on October 17, 2014
  61. Stat

    A random sample of 50 households in community A has a mean household income of X- =Rs. 44,600 with a standard deviation s =Rs. 2,200. A random sample of 50 households in community B has a mean of _X = Rs. 43,800 with a standard deviation of Rs. 2,800.

    asked by Faheem on June 2, 2014
  62. probability

    Exercise: Sections of a class A class consists of three sections with 10 students each. The mean quiz scores in each section were 40, 50, 60, respectively. We pick a student, uniformly at random. Let X be the score of the selected student, and let Y be the

    asked by RVE on March 14, 2015
  63. statistics

    Question 6: A manufacturer knows that the number of items produced per hour by its two factories A and B is normally distributed with standard deviations 8.0 and 11.0 items respectively. The mean hourly amount produced by Firm A from a random sample of 50

    asked by molebogeng on April 12, 2012
  64. intro to statistics

    A random study of recent graduates' average grades and degrees showed the following results. Grade Degree C B A B.S. 6 9 13 B.A. 5 12 10 If a graduate is selected at random, find these probabilities. 1.The graduate has a B.S. degree, given that he or she

    asked by Mark Jessen on December 9, 2011
  65. probability

    FUNCTIONS OF A STANDARD NORMAL The random variable X has a standard normal distribution. Find the PDF of the random variable Y, where: 1. Y=3X-1 , Y = 3X - 1 answer: fY(y)=1/3*fX*(y+1/3) f_ Y(y)=1/3*f_ X*(y+1/3) 2. Y=3X^2-1. For y>=-1, Y = 3X^2 - 1. For y

    asked by RVE on March 18, 2015
  66. math

    A bag has 4 red marbles, 4 blue marbles, and 2 green marbles. Jessie draws a marble from the bag at random, notes the color, and then replaces the marble.She then draws a second marble at random.What is the probability that both the marbles are green? a.

    asked by thomas on April 17, 2014
  67. statistics

    Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for the Vanguard Total Stock Index (all Stocks). Let y be a random variable representing annual return for the Vanguard Balanced

    asked by Karen on August 18, 2010
  68. Stat

    Does anyone know how to solve for this Suppose that a principal of a local high school tracks the number of minutes his students spend texting on a given school day. He finds that the distribution of minutes spent texting is roughly normal with a mean of

    asked by jen on April 23, 2016
  69. math

    A farmer is using a random sample to predict the number of broken eggs in a shipment of 3,000 eggs. Using a calculator, the farmer generates the following random numbers. The numbers 1-250 represent broken eggs. 477, 2116, 1044, 81, 619, 755, 2704, 900,

    asked by Tim on March 5, 2016
  70. Math

    2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students. Male 78 87 75 64 90 80 65 86 74 81 Female 71 50 80 75 90 61 85 81 Test

    asked by Paulo on July 10, 2016
  71. statistics

    Suppose you are trying to estimate the percent of women in a city. Other things being equal, a simple random sample of 0.1% of the population of a city that has 2,000,000 people is ________ as a simple random sample of 0.1% of the population of a city that

    asked by sarah on May 20, 2013
  72. statistics

    Suppose you are trying to estimate the percent of women in a city. Other things being equal, a simple random sample of 0.1% of the population of a city that has 2,000,000 people is ________ as a simple random sample of 0.1% of the population of a city that

    asked by sarah on May 20, 2013
  73. Math (Probability)

    In a random poll of science students, it was determined that 90% of students submitted tests before the deadline. In a random sample of 75, what is the probability that exactly 10 submitted after the deadline? What is the probability that less than 10

    asked by Meghan on August 20, 2015
  74. maths

    Consider a 25×25 grid of city streets. Let S be the points of intersection of the streets, and let P be the set of paths from the bottom left corner to the top right corner of which consist of only walking to the right and up. A point s is chosen

    asked by rishabh on June 11, 2013
  75. probablity

    We are given a biased coin , where the probability of heads is q. he bias q is itself the realization of a random variable Q which is uniformly distributed on the interval [0,1]. We want to estimate the bias of the coin. We flip it 5 times, and define

    asked by Anonymous on December 23, 2018
  76. math *check*

    11. A basket contains the following pieces of fruit: 3 apples, 2 oranges, 2 bananas, 2 pears, and 5 peaches. Jonas picks a fruit at random and does not replace it. Then Beth picks a fruit at random. What is the probability that Jonas gets a peach and Beth

    asked by Me on June 11, 2014
  77. Probability

    This figure below describes the joint PDF of the random variables X and Y. These random variables take values in [0,2] and [0,1], respectively. At x=1, the value of the joint PDF is 1/2. Are X and Y independent? - unanswered Yes No Find fX(x). Express your

    asked by ubn on March 18, 2015
  78. math

    a drawer contains 2 red socks, 5 white socks, and 6 blue socks. without looking, you select a sock at random, replace it, and selecct a second sock at random. what is the probability that the first sock is blue and the second sock is red?

    asked by Taylor on May 24, 2012
  79. math

    The Gallup Poll uses a procedure called random digit dialing, which creates phone numbers based on a list of all area codes in America in conjunction with the associated number of residential households in each area code. Give a possible reason the Gallup

    asked by wendy on January 11, 2017
  80. Statistics

    n order to study the amounts owed to the city council, a city clerk takes a random sample of 16 files from a cabinet containing a large number of delinquent accounts and finds the average amount owed to the city to be $231. It has been claimed that the

    asked by Dick on May 24, 2011
  81. Math

    On a certain road 20% of the vehicles are trucks, 16% are buses and the remainder are cars. (i) A random sample of 11 vehicles is taken. Find the probability that fewer than 3 are buses. [3] (ii) A random sample of 125 vehicles is now taken. Using a

    asked by Josh on April 8, 2011
  82. math

    There are two jars, A and B. Jar A contains 7 red and 2 blue marbles, while jar B contains 5 red and 4 blue marbles. You roll a fair die.If you get a 2 or a 3, you pick a random marble from jar A and put it in jar B. You then pick a random marble from jar

    asked by daniel johnson on February 4, 2016
  83. prob. & stat

    In a random sample of 63 women at a company, the mean salary is $48,902 with a standard deviation of $5270. In a random sample of 50 men at the company, the mean salary is $53,454 with a standard deviation of $4677. Construct a 95% confidence interval for

    asked by sweet12 on May 10, 2015
  84. prob & stat

    In a random sample of 63 women at a company, the mean salary is $48,902 with a standard deviation of $5270. In a random sample of 50 men at the company, the mean salary is $53,454 with a standard deviation of $4677. Construct a 95% confidence interval for

    asked by sweet12 on May 10, 2015
  85. stats please help test tom

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

    asked by david on January 25, 2007
  86. QSO 510

    During the dinner hour, the distribution of the inter-arrival time of customers at a restaurant is estimated to be as shown below. The mode of payment and the service times of the cash and credit card customers are shown in the following tables. Complete

    asked by Anonymous on March 19, 2013
  87. Statistics

    Problem During the dinner hour, the distribution of the inter-arrival time of customers at a restaurant is estimated to be as shown below. The mode of payment and the service times of the cash and credit card customers are shown in the following tables.

    asked by Anonymous on March 17, 2013
  88. Calculus

    According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. A. What is the probability that an adult male chosen at random is between 61 inches

    asked by Robin on November 3, 2013
  89. math

    Suppose that n tennis players want to play an elimination tournament. That means: they pair up, at random, for each round; if the number of players before the round begins is odd, one of them, chosen at random, sits out that round. The winners of each

    asked by Hi on February 20, 2012
  90. Probability

    Let N be a geometric r.v. with mean 1/p; let A1,A2,… be a sequence of i.i.d. random variables, all independent of N, with mean 1 and variance 1; let B1,B2,… be another sequence of i.i.d. random variable, all independent of N and of A1,A2,…, also with

    asked by A on April 3, 2014
  91. stats

    On a test of motor coordination, the population of average bowlers has a mean score of 24, with a standard deviation of 6. A random sample of 30 bowlers at Fred's Bowling Alley has a sample mean of 26. A second random sample of 30 bowlers at Ethel's

    asked by lisa on February 8, 2015
  92. Math

    On a test of motor coordination, the population of average bowlers has a mean score of 24, with a standard deviation of 6. A random sample of 30 bowlers at Fred's Bowling Alley has a sample mean of 26. A second random sample of 30 bowlers at Ethel's

    asked by Cheryl on October 8, 2015
  93. stats again please help

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

    asked by david on January 23, 2007
  94. Math

    Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

    asked by Jen on October 21, 2011
  95. NEED HELP PLZ!!! STATS

    Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

    asked by Jennifer on October 24, 2011
  96. statistics

    Two cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of Jacks drawn in a set of 2 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

    asked by mom on October 4, 2012
  97. Stats

    Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

    asked by Jennifer on October 23, 2011
  98. statistics

    8. Suppose that the IQ score for a person selected from a certain group of people is approximately N(; 100). Let X1;X2; : : : ;Xn be a random sample of such IQ scores. (a) How large should n be so that a 90% con dence interval for  with maximum error " =

    asked by rose on December 5, 2012
  99. statistics

    A doctor wants to know if her patients are happy with her. She decides to survey a sample of her clients. What method would be best for choosing a random sample that is a fair representation of her patients? A. Assign numbers to each patient and then use a

    asked by Raishawn on July 13, 2014
  100. statistics

    drawer contains 50 bolts and 150 nuts. Half of the bolts and half of the nuts are rusted. If one item is chosen at random, what is the probability that it is rusted or a bolt ? In a study to test whether there is a difference between the average height of

    asked by RAJESH on April 14, 2010