A warehouse contains six parts made by company A and ten parts made by company B. If four parts are selected at random from the warehouse, the probability that one of the four parts is from company B is approximately .1099.
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Q. 2Which of the following is not a part of the formula for constructing a confidence interval estimate of the population proportion?
a. a point estimate of the population proportion
b. the standard error of the sampling distribution of the sample proportion
c. the confidence coefficient
d. the value of the population proportion
e. the standard error of the sampling distribution of the sample proportion and the confidence coefficient
Q. 3Distribution-free or nonparametric methods provide test statistics for an unspecified distribution.
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Q. 4A warehouse contains six parts made by company A and ten parts made by company B. If four parts are selected at random from the warehouse, the probability that none of the four parts is from company A is approximately .1154.
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Q. 5After constructing a confidence interval estimate for a population mean, you believe that the interval is useless because it is too wide. In order to correct this problem, you need to:
a. increase the population size
b. increase the sample mean
c. increase the confidence coefficient
d. increase the sample size
e. decrease the sample size
Q. 6The efficiency of a nonparametric test is the probability that a false null hypothesis is rejected.
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Q. 7A hypergeometric probability distribution shows the probabilities associated with possible values of a discrete random variable when these values are generated by sampling with replacement and the probability of success, therefore, changes from one trial to the next.
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