In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours.A random sample of people to take the memory test is going to be chosen. Let be the proportion of people in the sample who pass the test.Answer the following. (If necessary, consult a list of formulas.)(a)Find the mean of .(b)Find the standard deviation of .(c)Compute an approximation for , which is the probability that more than of the people in the sample pass the test. Round your answer to four decimal places.

In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. FEED A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. OO Answer the following. (If necessary, consult a list of formulas.) EO (a) Find the mean of p. X D O (b) Find the standard deviation of p. (C) Compute an approximation for P (p > 0.84 ), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0