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Suppose x has a distribution...

Suppose x has a distribution with μ = 18 and σ = 17.

(a) If a random sample of size n = 34 is drawn, find μx, σ x and P(18 ≤ x ≤ 20). (Round σx to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =(b) If a random sample of size n = 55 is drawn, find μx, σ x and P(18 ≤ x ≤ 20). (Round σ x to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =(c) Why should you expect the probability of part (b) to be higher than that of part (a)?

(a) If a random sample of size n = 34 is drawn, find μx, σ x and P(18 ≤ x ≤ 20). (Round σx to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =(b) If a random sample of size n = 55 is drawn, find μx, σ x and P(18 ≤ x ≤ 20). (Round σ x to two decimal places and the probability to four decimal places.)

μx =

σ x =

P(18 ≤ x ≤ 20) =(c) Why should you expect the probability of part (b) to be higher than that of part (a)?

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