a. p= --0.2 The mean of the sampling distribution of p is The standard deviation of the sampling distribution of p is (Round to four decimal places as needed.) A random sample of n = 49 observations is drawn from a population with a mean equal to 22 and a standard deviation equal to 21. Complete parts a through g below. a. Give the mean and standard deviation of the (repeated) sampling distribution x. O- ESuppose a random sample of n = 647 measurements is selected from a binomial population with probability of success p. For each of the given values of p, give the mean and standard deviation of the sampling distribution of the sample proportion, p. Complete parts a through c below. a. p = 0.2