Suppose x has a distribution with μ = 15 and σ = 13.
(a) If a random sample of size n = 41 is drawn, find μx, σx and P(15 ≤ x ≤ 17). (Round σx to two decimal places and the probability to four decimal places.)
μx =?
σx =?
P(15 ≤ x ≤ 17) =?
(b) If a random sample of size n = 57 is drawn, find μx, σx and P(15 ≤ x ≤ 17). (Round σx to two decimal places and the probability to four decimal places.)
μx =?
σx =?
P(15 ≤ x ≤ 17) =?