Suppose x has a distribution with = 21 and = 16.
(a) If a random sample of size n = 49 is drawn, find x, x and P(21 ≤ x ≤ 23). (Round x to two decimal places and the probability to four decimal places.)
x =
x =
P(21 ≤ x ≤ 23) =
(b) If a random sample of size n = 59 is drawn, find x, x and P(21 ≤ x ≤ 23). (Round x to two decimal places and the probability to four decimal places.)
x =
x =
P(21 ≤ x ≤ 23) =
