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In a group of five items, two are defective. Find the distribution of N, the number of draws we need to find the first defective item. Find the mean and variance of N.
the variance of a sample of 81 observations equals 64. the standard deviation of the sample equalschoose one answer.a.
Two chi-square distributions were plotted on the same chart. One distribution was for 3 degrees of freedom and the other was for 12 degrees of freedom. Which distribution would tend to approach a normal distribution?
a new grug had a potency advertised at 75. given the following smaple datan25x bar 76.6s1a check manufacturers claim
What is the probability that the trainee class will consist entirely of men or women? Round your answer to the nearest thousandth.
a sample of 100 people is classified by gender malefemale and by whether or not they are registered voters. the sample
In standardized form, the normal distribution a) Has a mean of 0 and a standard deviation of 1 b) Has a mean of 1 and a variance of 0 c) Has an area equal to 0.5 d) Cannot be used to approximate discrete probability distributions
question 1 8 marks the australian divorce rate has been steadily increasing over the years until late 1990s. however
A study of injuries to in line skaters used data from the National Electronic Injury Surveillance System, which collects data from a random sample of hospital emergency rooms.
If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?
Give a 99% confidence interval for the proportion of all U.S. adults who attended church or synagogue during the week preceding the poll.
A stationery store wants to estimate the total retail value of the 300 greeting cards that it has in its inventory. What are the upper and lower limits of the 95% confidence interval estimate of the population total value of all greeting cards tha..
testing equality of two means.an independent testing agency has been contracted to determine whether there is any
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