random

4,702 results, page 5
  1. statistics

    Starting with a population that is normally distributed with a mean of 100 and a standard deviation of 12, answer the following questions (if possible). a. What is the probability of randomly drawing a single score between 100 and 106, p(100 < X < 106)? b.

    asked by Daniel on October 15, 2011
  2. Statistics

    The International Olympic Committee states that the female participation in the 2000 Summer Olympic Games was 42%, even with new sports such as weight lifting, hammer throw, and modern pentathlon being added to the Games. Broadcasting and clothing

    asked by LT on October 29, 2007
  3. math

    You roll a number cube numbered from 1 to 6. what is the probability you roll a number divisible by 4? Answer: I think 2/6 or 1/3 A number from 16 to 23 is drawn at random. what is the probability you draw a number greater than 18? Answer 5/7 A jar

    asked by Anonymous on March 13, 2014
  4. college stats

    help please!!! 1. The average number of bumped passengers per day on FliRite Airlines is 2.47 with a standard deviation of 1.75. For a random sample of 40 days, what is the chance the average number of bumped passengers in the sample is between 2 and 2.75?

    asked by penelope on July 12, 2013
  5. math

    Which sample is better for making a prediction? Why? Sample A: A random sample of 10 customers leaving a store Sample B: A random sample of 100 customers leaving a store i think maybe sample a would be more better for just a prediction because it's just 10

    asked by MAX on May 22, 2016
  6. Math

    1. A customer comes into Pierre's and orders a random assortment of 6 danish. At the time she comes in, there are 26 danish sitting out: 12 raspberry, 8 cheese, and 6 cinnamon. Assume the danish are not replaced. a) What is the probability that the third

    asked by Cece on November 10, 2013
  7. statistics

    Bill has completed a 10-question multiple-choice test on which he answered 7 questions correctly. Each question had one correct answer to be chosen from five alternatives. Bill says that he answered the test by randomly guessing the answers without reading

    asked by elegantina on January 28, 2017
  8. Probability

    Manhole explosions (usually caused by gas leaks and sparks) are on the rise in your city. On any given day, the manhole cover near your house explodes with some unknown probability, which is the same across all days. We model this unknown probability of

    asked by qwerty on April 21, 2015
  9. Statics

    You suspect that, on the average, professional baseball players are older than professional football players. A random sample of 30 professional baseball players has a mean age of 28.8 years (assume ó = 4). A random sample of 40 professional football

    asked by Heather on December 2, 2012
  10. Elementary Statistic

    twenty-five percent of all death are caused by diseases of the heart Ischemic heart disease accounts for 16.4% of all death and heart failure for 2.3% choose one death at random. What is the probability that it is from ischemic heart disease given that it

    asked by Angela on June 24, 2015
  11. elementary statistics

    compute the variable of the random varible X

    asked by Anonymous on April 26, 2011
  12. math

    A number from 20 to 30 is drawn at random. Posibility of it not a 23

    asked by grace on May 13, 2014
  13. math(statistics)

    suppose a random variable X can equal to 1,2,3,4,or 5. if P(x3)=.5 (a)p(x=3) and b P(x

    asked by Ron on March 19, 2013
  14. intro to psychology

    Random assignment can be described as a research method:

    asked by elly on June 20, 2015
  15. introduction to psychology 1

    Random assignment can be described as a research method:

    asked by Anonymous on August 17, 2013
  16. math

    Let x1,x2,x3 be random sample of f(x)=exp(-x),x>0,zero elsewhere,if y1=x1/x2,y2=x3/(x1+x2),y3=x1+x2 find g(y1,y2,y3),g(y1),g(y2,y3)

    asked by assma on December 28, 2014
  17. introduction to psychology 1

    Random assignment can be described as a research method:

    asked by Anonymous on August 18, 2013
  18. Statistics

    A random variable x has the following probability distribution: x f(x) 0 0.08 1 0.17 2 0.45 3 0.25 4 0.05

    asked by Donzella on February 29, 2016
  19. STAT

    A random variable X2 assumes only positive value.?

    asked by azriel ed pagayunan on October 11, 2011
  20. statistics

    a study found 37% of a new technique resulted in pregnancy and in that technique 25% resulted in multiple births what is the probabilty that the new technique produced a pregnacy and multiple births what is probability that a random selected pregnancy did

    asked by jane on June 6, 2013
  21. STATISTICS

    The number of boxes of girl scout cookies sold by each of the girl scout in a city has a distribution which is approximately normal with a mean=75 boxes and a standard deviation=30 boxes.... 1.) find the probability that scout chosen at random sold between

    asked by Mason on August 10, 2011
  22. College Math

    A bucket contains orange tennis balls and yellow tennis balls from which 5 balls are selected at random, but assume that the bucket contains 7 orange balls and 6 yellow balls. (1) What is the probability that, of the 5 balls selected at random, at least

    asked by Sigmund on March 1, 2009
  23. Statistics

    Assume the weights of men are normally distributed having a mean of 185 lbs and a standard deviation of 17 pounds. A. Calculate the probability a randomly selected man weights less than 225 lbs B. Approximately 72% of men’s weights exceed how many

    asked by Bill on March 27, 2013
  24. Stats

    A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random

    asked by Emile on November 17, 2013
  25. Hypothesis Test

    A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random

    asked by Simon on November 17, 2013
  26. algebra 1

    1. MULTI-STEP PROBLEM There are 5743 known amphibian species in the world. Of these, 1856 species are judged to be at risk of extinction, and another 113 species may already be extinct. a. Find the probability that an amphibian species chosen at random is

    asked by Ruby on May 17, 2016
  27. statistics

    Statistical Abstracts (117th edition) provides information aboutthe number of registered automobiles, including taxis, by state. The number ofregistered automobiles per 1,000 residents follows an approximately normaldistribution with mean ì = 514.6 and

    asked by Anonymous on April 19, 2012
  28. maths

    There is an auction for a house, with a List Price of $100K. There are only two bidders, who bid randomly, one after another. Their bids are in the $0 to $100K range. They don’t know what the other person bid (even if they did, it wouldn’t matter cause

    asked by nkm on April 12, 2013
  29. Statistics

    An opinion poll asks a random sample of 100 college seniors how they view their job prospects. In all, 53 say "Good." The 95% confidence interval has a margin of error of 9.9%. The sample used actually included 130 college seniors but 30 of the seniors

    asked by Samantha on November 11, 2013
  30. math

    Let x1,x2,x3 be random sample of normal(6,4), find P(max{x1,x2,x3}>8)

    asked by assma on December 28, 2014
  31. math

    If two people are selected at random, what is the probability that they were both born in May?

    asked by CC on June 10, 2011
  32. math

    Let x be the standard normal random variable. find the following: a)P(0)

    asked by vilma on October 26, 2012
  33. Math

    Can someone help please. I'm really confused. 12 + 3(2y – 3) Thank you random person if you do help me! It would be really great and helpful if you do.

    asked by MeowCat97 on October 19, 2015
  34. Algebra

    This question was just some random one on a math sheet. There were no directions, and I"m not sure what to do. 5(x-3)=? Thanks!

    asked by Student on June 6, 2009
  35. math

    Let x1,x2,x3 be random sample of normal(6,4), find P(max{x1,x2,x3}>8)

    asked by assma on December 28, 2014
  36. statistics

    Z is a standard normal random variate. For Pr(c < Z) = 0.278, what is the value for c?

    asked by lisa on May 18, 2016
  37. math

    What is the probability that one selected at random will read between -1.2 and 1.3 knots?

    asked by Cindy on October 12, 2011
  38. math

    Let x1,x2,x3 be random sample of normal(6,4)(x+1)/2,-1

    asked by assma on December 28, 2014
  39. statistics

    A random variable x has a following probability distribution. x: 0 1 2 3 P(X=x) 1/6 1/2 1/5 2/15 How to calculate E(1/(X+1))?

    asked by Mahalakshmi on August 24, 2011
  40. statistics

    the random variable x is known to be uniformly distributed between 70 and 90. the probability of x having a value between 80 to 95 is

    asked by Anonymous on December 7, 2011
  41. Statistics

    x is a random variable with the probability function: f(X) = x/6 for x = 1, 2 or 3 the expected value of X is?

    asked by Shellie on October 8, 2009
  42. Maths

    The distribution function of a random variable is given by F(x)= {0 , for x

    asked by Rami on August 20, 2014
  43. math

    3.The distribution function of a random variable is given by F(x)= {0 , for x

    asked by Rami on August 20, 2014
  44. math

    A random variable x has a probability distribution. How to calculate E(1/(X+1))?

    asked by Mahalakshmi on August 24, 2011
  45. statistical applications

    when is random sampling not the best approach to sample selection?

    asked by anette on March 8, 2010
  46. stats

    Let z be a random variable with a standard normal distribution, P(-1.9

    asked by Clay on July 24, 2010
  47. probability

    The joint PMF, p X , Y ( x , y ) , of the random variables X and Y is given by the following table: y = 1 4 c 0 2 c 8 c y = 0 3 c 2 c 0 2 c y = − 1 2 c 0 c 4 c x = − 2 x = − 1 x = 0 x = 1

    asked by Anonymous on October 2, 2018
  48. algebra

    What is the probability that a month picked at random will have 31 days? A.5/12 B.4/12 C.7/12 D.8/12 I think it is C...?

    asked by Cassie on March 18, 2013
  49. college ststistics

    given x is a noramlly distributed random variable with a mean of 28 and a sd of 7 find p(x

    asked by melba on June 11, 2012
  50. math

    supposed that k is a random variable. given that P(-3.7

    asked by A on October 8, 2015
  51. maths

    what is the probability of picking Friday at random? (likely/impossible)

    asked by Anonymous on October 26, 2015
  52. math

    If a permutation is chosen at random, what is the probability that it begins with at least 2 A's?

    asked by bballer on September 26, 2012
  53. math

    A random variable x has a following probability distribution. x: 0 1 2 3 P(X=x): 1/6 1/2 1/5 2/15 How to calculate E(1/(X+1))?

    asked by Mahalakshmi on August 24, 2011
  54. analysis

    What is meant by the sample space for a random experiment?

    asked by Kasey on May 18, 2012
  55. math

    If a student is selected at random, find the probability a)

    asked by Carlos on March 25, 2007
  56. Math - Statistics

    Suppose that the mean number of customers who arrive at the check-out counters each minute is 4. Create a Poisson Distribution with u (lamda) = 4 for x = 0 to 20. Compare your results to the histogram. 20 random numbers are generated with a Poisson

    asked by J on December 6, 2007
  57. statistics

    A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed. 1. Identify the population mean. The population mean is 8. 2. Identify the

    asked by Cameron on June 3, 2013
  58. Alegebra

    Can some one please help me with this 3 problems I have a hard time with probabilities I'm studying for my mid-term. Thank you 1) Urn A has balls numbered 1 through 7. Urn B has balls numbered 1 through 5. A ball is selected at random from urn A and then a

    asked by Jessi on September 11, 2009
  59. probability

    The vertical coordinate (“height") of an object in free fall is described by an equation of the form x(t)=θ0+θ1t+θ2t2, where θ0, θ1, and θ2 are some parameters and t stands for time. At certain times t1,…,tn, we make noisy observations Y1,…,Yn,

    asked by A on April 2, 2014
  60. statistics

    Suppose that large dogs weights are normally distributed with a mean of 100 pounds and a standard deviation of 10 pounds. If one of these dogs is picked random: a) what is the probability that the dog will weigh over 110 pounds? b) what is the probability

    asked by Anonymous on March 27, 2010
  61. statistics

    A random sample of 150 investment bankers (population 1) had thirty percent who expressed dissatisfaction with their choice of career. A random sample of 200 financial analysts (population 2) had forty-two percent who expressed dissatisfaction. In testing

    asked by Anonymous on March 27, 2015
  62. Maths A

    Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 inclusive. o The next ten (10) numbers must lie in the range from 30 to 70 inclusive. o The remaining eight (8) numbers must lie in

    asked by Anna on February 25, 2013
  63. Stats

    let x be a binomial random variable with expected valuee 4 and variance 2 a) What is P(X=3)? b) What is P(X

    asked by john on April 26, 2017
  64. probability April-005

    X is a random variable following binomial distribution with mean 2.4 and variance 1.44 find

    asked by probability on April 18, 2013
  65. math

    Let X be a Binomial random variable with parameters n and 0 < p < 1. Show that lim E(1 + X) · E(1/1 + X)= 1. n→∞

    asked by Jeremy on November 15, 2014
  66. Stats

    If X is a normal random variable with mean 60, and a standard deviation of 2, find: A: P (X63) C: P(57

    asked by April on March 26, 2009
  67. Probability

    A random variable N has a cumulative distribution function given by F(x)={ 0 for x

    asked by Julie on February 2, 2009
  68. stata

    What is the probability that a person selected at random from data will be male?

    asked by shiela on October 23, 2010
  69. statistics

    If the random variable z is the standard normal score and a > 0, is it true that P(z > -a) = P(z < a)? Why or why not?

    asked by tina on November 27, 2011
  70. Probability

    A random variable N has a cumulative distribution function given by F(x)={ 0 for x

    asked by Julie on February 2, 2009
  71. School

    What are some secret random acts of Kindness??? Like something where you do something nice for someone, but they don't know who it is...

    asked by Anonymous on October 16, 2007
  72. Maths

    A dice is thrown at random. Find the probability of getting a number less than 3

    asked by Vanshika on March 5, 2017
  73. Statistics

    If I choose 5 cards at random, how many ways are there to get a full house?

    asked by Tammie on February 2, 2014
  74. Probability

    A random variable N has a cumulative distribution function given by F(x)={ 0 for x

    asked by Julie on February 2, 2009
  75. statistics

    from a group of six people two individuals are to be selected at random. How many possible selections are there?

    asked by maria on January 8, 2011
  76. science

    how do you find the power when they give you random weird information

    asked by alice on April 23, 2010
  77. Statistics

    Use this information to calculate the mean and standard deviation of this random variable. P(x)- .25, .05, .55, .15

    asked by Bill on March 27, 2013
  78. Math

    X is a normally distributed random variable with a mean of 8.00. If the probability that X is less than 9.54 is 0.67, then what is the standard deviation of X?

    asked by Elizabeth on April 2, 2016
  79. math

    Page 9 of 9 What is the probability that a point chosen at random on segment PQ will be between -1 and 3? -5 through 5

    asked by sha on April 1, 2011
  80. statistics

    Let X be a Binomial random variable with parameters n and 0 < p < 1. Show that lim E(1+X)·E(1+X)·E(1/1+X)=1. n→∞

    asked by Jeremy on November 15, 2014
  81. stat

    When rolling a die, is this an example of a discrete or continuous random variable?

    asked by Bruce on June 17, 2013
  82. statistics

    Let X be a Binomial random variable with parameters n and 0 < p < 1. Show that lim E(1 + X) · E(1/1 + X)= 1. n→∞

    asked by Jeremy on November 15, 2014
  83. math

    Find the probability between 42 and 48 speeders in a random sample of 100

    asked by john jones on May 2, 2013
  84. Probability

    The random variable is uniform in the (-2c,2c)interval . Find and sketch F(y) and f(y) if Y=X^2

    asked by Anonymous on October 13, 2011
  85. math

    a student chosen at random failed a driving test.

    asked by terry on March 13, 2010
  86. business statistics

    Assume that X is a binomial random variable with n = 5 and p = 0.35. Calculate the following probabilities?

    asked by Alicia on November 14, 2012
  87. math

    This is a statistics problem. A laboratory test for the detection of a certain disease give a positive result 5 percent of the time for people who do not have the disease. The test gives a negative result 0.3 percent of the time for people who have the

    asked by Anonymous on September 24, 2007
  88. statistics

    Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is mound-shaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we

    asked by Joy on August 10, 2011
  89. statistics

    . A certain researcher thinks that the proportion of women who say that female bosses are harshly critical is greater than the proportion of men. In a random sample of 200 women, 27% said that female bosses are harshly critical. In a random sample of 220

    asked by Alexandra on November 28, 2012
  90. probability

    For each of the following sequences, determine the value to which it converges in probability. (a) Let X1,X2,… be independent continuous random variables, each uniformly distributed between −1 and 1. Let Ui=X1+X2+⋯+Xii,i=1,2,…. What value does the

    asked by juanpro on April 22, 2014
  91. Probability

    Consider three random variables X, Y, and Z, associated with the same experiment. The random variable X is geometric with parameter p∈(0,1). If X is even, then Y and Z are equal to zero. If X is odd, (Y,Z) is uniformly distributed on the set

    asked by qwerty on March 7, 2015
  92. statistics

    Four jelly beans are selected, one at a time from a bowl containing 6 black, 6 red and 6 green jelly beans. Let x represent the number of black jelly beans selected in 4 draws from the bowl. (A) If this experiment is completed without replacing the jelly

    asked by kelly on November 28, 2010
  93. Probability

    For each of the following sequences, determine the value to which it converges in probability. (a) Let X1,X2,… be independent continuous random variables, each uniformly distributed between −1 and 1. Let Ui=X1+X2+⋯+Xii,i=1,2,…. What value does the

    asked by A on April 23, 2014
  94. state

    Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 55 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed,

    asked by Dawn on July 11, 2015
  95. stor

    Twitter: Suppose that the population proportion of Internet users whosay they use Twitter or a similar service to post updates about themselves or to see updates about others is 19%. Think about selecting random samples from a population in which 19% are

    asked by ami on September 17, 2012
  96. statistics; emergency please help me

    Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). a. P(z -1.5) b. P(z -2.5)

    asked by Vanessa on April 11, 2014
  97. math

    A simple random sample of 800 individuals provides 250 Yes responses.

    asked by bob on November 17, 2015
  98. Math

    a number between 1000 and 9999, inclusive, is chosen at random. what is the probability that it contains a)no 9's? b) at least one 9?

    asked by Taryn on October 3, 2013
  99. Statistics

    A random variable X is normally distributed with ì = 60. Convert the value of X to a z-score, if the standard deviation is as given. X = 60; ó = 7 A) 7 B) 1 C) 60/70 D) 0

    asked by Megan on March 3, 2011
  100. GEOMETRY

    A letter is chosen at random from the word mathematics. what is the probability of choosing either a T or an M? A) 4/11 B) 3/11 C) 1/11 D) 2/11

    asked by kay on June 26, 2016