4.10 When not interrupted artificially, the duration of human pregnancies can be described, we’ll assume, by a mean of 9 months (270 days) and a standard deviation of one-half month (15 days).

Question

4.10 When not interrupted artificially, the duration of human pregnancies can be described, we’ll assume, by a mean of 9 months (270 days) and a standard deviation of one-half month (15 days).

(b) A small minority of all babies will arrive sooner than ______?

Answer 1

68 - 95 - 99 %'s

1, 2 and 3 standards

.5 best answer

each ends are 17 - 2.5 and .5 %

2.5%

.5% are best answers

even a