Question

Let x be a continuous random variable that has a normal distribution with μ=85 and σ=12....

Let x be a continuous random variable that has a normal distribution with μ=85 and σ=12. Assuming n/N ≤ 0.05, find the probability that the sample mean, x¯, for a random sample of 18taken from this population will be between 81.7 and 90.4.

Round your answer to four decimal places.

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Answer #2

Refer Standard normal table/Z-table to find the probability OR use excel formula "=NORM.S.DIST(1.9092, TRUE)" & "=NORM.S.DIST(-1.1667, TRUE)" to find the probability.
answered by: anonymous
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