he lengths of pregnancies are normally distributed with a mean of 268 days and a standard of deviation of 15 days. If a sample of 81 women are randomly selected, a. find the probability that they have a mean pregnancy less than 265 days. (3 marks) b. find the probability that they have a mean pregnancy between 268 days and 270 days.
he lengths of pregnancies are normally distributed with a mean of 268 days and a standard of deviation of 15 days. If a sample of 81 women are randomly selected, a. find the probability that they have a mean pregnancy less than 265 days. (3 marks) b. find the probability that they have a mean pregnancy between 268 days and 270 days.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The lengths of pregnancies are
deviation of 15 days. If a sample of 81 women are randomly selected,
a. find the probability that they have a mean pregnancy less than 265 days. (3
marks)
b. find the probability that they have a mean pregnancy between 268 days and 270 days.
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