The gestation period of humans follows a normal distribution with a mean of 266 days and a standard deviation of 16 days. Find the probability that a random sample of 15 pregnancies has a mean gestation period of 260 days or less. O P(Z > -1.45) = 0.9265 O P (Z > 1.45) = 0.0735 O P (Z< -1.45) = 0.0735 O P(Z <1.45) = 0.9265
The gestation period of humans follows a normal distribution with a mean of 266 days and a standard deviation of 16 days. Find the probability that a random sample of 15 pregnancies has a mean gestation period of 260 days or less. O P(Z > -1.45) = 0.9265 O P (Z > 1.45) = 0.0735 O P (Z< -1.45) = 0.0735 O P(Z <1.45) = 0.9265
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Transcribed Image Text:The gestation period of humans follows a normal distribution with a mean of 266 days and a
standard deviation of 16 days.
Find the probability that a random sample of 15 pregnancies has a mean gestation period of 260
days or less.
O P (Z > –1.45) = 0.9265
%3D
O P(Z > 1.45) = 0.0735
%3D
O P(Z< –1.45) = 0.0735
O P(Z< 1.45) = 0.9265
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