Lengths of the pregnancies of a certain animal

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Reference no: EM132227839

So I keep getting this part of my questions wrong can you please show me step by step how I would go about getting it right. (P.S) please show all formulas in order so I follow how to do the work.

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean

mu equals 115 days μ=115 days

and standard deviation

sigma equals 11 days σ=11 days.

Complete parts? (a) through? (f) below.

c) What is the probability that a random sample of

21 pregnancies has a mean gestation period of

111 days or? less? The probability that the mean of a random sample of

21 pregnancies is less than 111days is approximately 0.0478

Reference no: EM132227839

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