Mathematics, 25.02.2020 21:26 iixyloa
Let X denote the length of human pregnancies from conception to birth, where X has a normal distribution with mean of 264 days and standard deviation of 16 day
a. What is the probability that the sample mean length of pregnancy for 15 randomly selected women lasts less than 260 days.
b. The probability that the total length of pregnancy for 15 randomly selected women is greater than a certain amount is 0.05. Find this total length.
c. What is the probability that the sample total length of pregnancy for 7 randomly selected women is between 1800 and 1900 days?
d. The probability that the average length of pregnancy for randomly selected women is greater than 270 is 0.1151. Find the sample size of the random sample.
Answers: 3
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Let X denote the length of human pregnancies from conception to birth, where X has a normal distribu...
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