A random sample is to be selected from a population that has a proportion of successes = 0.75.a. Determine the mean and standard deviation of the samp

A random sample is to be selected from a population that has a proportion of successes = 0.75.a. Determine the mean and standard deviation of the sample proportion P hat when the sample size .n=400.b. for n, what is P(0.7<"P hat" <0.8)?

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