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Mathematics, 02.06.2021 19:20 webbhlharryteach

The length of human pregnancies from conception to birth approximates a normal distribution with a mean of 264 days and a standard deviation of 14 days. What proportion of
all pregnancies will last between 242 and 268 days (roughly between 8 and 9 months)
a.
0.554
b. 0.387
C. 0.768
d. 0.897

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