Lengths of pregnancies (in humans) have a mean of 267.8 days and a standard devi

Question

Lengths of pregnancies (in humans) have a mean of 267.8 days and a standard deviation of 14.8 days. A woman tracked her pregnancy and found it to be 313 days.
(a) Find the z score for 313 days. (b) Is such length unusual?
Lengths of pregnancies (in humans) have a mean of 267.8 days and a standard deviation of 14.8 days. A woman tracked her pregnancy and found it to be 313 days.
(a) Find the z score for 313 days. (b) Is such length unusual?

(a) Find the z score for 313 days. (b) Is such length unusual?

Explanation / Answer

Z = 313 - 267.8 / 14.8

Z=3.05

p value : 0.00114

b)

yes is very unusual because p value is very lower

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