A random sample of n = 70 measurements is drawn from a binomial population with probability of

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A random sample of n = 70 measurements is drawn from a binomial population with probability of success .3.

a. Give the mean and standard deviation of the sampling distribution of the sample proportion, pn.

b. Describe the shape of the sampling distribution of pn.

c. Calculate the standard normal z-score corresponding to a value of pn = .33.

d. Find P1pn 7 .332.

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