Question

Suppose x has a distribution with μ = 10 and σ = 2. (a) If a random sample of size n = 39 is drawn, find μx, σ x and P(10 ≤ x ≤ 12). (Round σx to two decimal places and the probability to four decimal places.) μx = σ x = P(10 ≤ x ≤ 12) = (b) If a random sample of size n = 56 is drawn, find μx, σ x and P(10 ≤ x ≤ 12). (Round σ x to two decimal places and the probability to four decimal places.) μx = σ x = P(10 ≤ x ≤ 12) =

Answer 1

Ielalion ' - siutn that uuhltion mlan 1o,8D,= 2 A) f ampling Atnchutsn muon stondard deiation f hamflng dibribalion tf nlans is 2 0-320 J39 P(10 X 1) 10- P 12-M S 2<12-10 o-320 lo-10 0-320 -5.93 B) mfhking Satrcbatien d meon mesns stad deviation of somflkngdtrbation efmesnd is 2 = 0-26 P (10XS IB)= P I0-u FI 12-4 1o-10 7< 12-1o 0-26 O.26 -7.43

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