for a normal population with M = 80 and theta =20 which of the following samples
ID: 3020174 • Letter: F
Question
for a normal population with M = 80 and theta =20 which of the following samples is least likely to be obtained A. M greater than 90 for a sample of n = 4 B. M greater than 88 for a sample of n = 25 C. M greater than 85 for a sample of n = 4 D. M greater than 84 for a sample of n = 25for a normal population with M = 80 and theta =20 which of the following samples is least likely to be obtained A. M greater than 90 for a sample of n = 4 B. M greater than 88 for a sample of n = 25 C. M greater than 85 for a sample of n = 4 D. M greater than 84 for a sample of n = 25
for a normal population with M = 80 and theta =20 which of the following samples is least likely to be obtained A. M greater than 90 for a sample of n = 4 B. M greater than 88 for a sample of n = 25 C. M greater than 85 for a sample of n = 4 D. M greater than 84 for a sample of n = 25
Explanation / Answer
z = (X-Mean)/(S.D/sqrt n)
A) z = (90-80)/(20/sqrt 4) = +1
B) z = (85-80)/(20/sqrt 4) = +0.5
C) z = (88-80)/(20/sqrt 25) = +2
D) z = (84-80)/(20/sqrt 25) = +1
Answer to the question is CHOICE (B)
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