Suppose x has a distribution with μ = 18 and σ = 10. (a) If a random sample of size n = 37 is drawn, find μ x , σ x and P (18 ≤ x ≤ 20). (Round σ x to two decimal places and the probability to four...

(a) If a random sample of sizen = 37 is drawn, find μ_x, σ _x andP(18 ≤ x ≤ 20). (Round σ_x to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =

(b) If a random sample of sizen = 68 is drawn, find μ_x, σ _x andP(18 ≤ x ≤ 20). (Round σ _x to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =