2. The length in days of human pregnancies is known to be normally distributed with a mean of 266 days and a standard deviation of 16 days. a. between what number of days do the middle 95% of all pregnancies fall? b. How long do the shortest 2.5% of all pregnancies last? c. How long do the longest 5% of all pregnancies last? d. If a pregnant woman is randomly chosen, what is the probability that her pregnancy will last longer than 270 days?
2. The length in days of human pregnancies is known to be normally distributed with a mean of 266 days and a standard deviation of 16 days. a. between what number of days do the middle 95% of all pregnancies fall? b. How long do the shortest 2.5% of all pregnancies last? c. How long do the longest 5% of all pregnancies last? d. If a pregnant woman is randomly chosen, what is the probability that her pregnancy will last longer than 270 days?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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2. The length in days of human pregnancies is known to be normally distributed with a mean of 266 days and a standard deviation of 16 days.
a. between what number of days do the middle 95% of all pregnancies fall?
b. How long do the shortest 2.5% of all pregnancies last?
c. How long do the longest 5% of all pregnancies last?
d. If a pregnant woman is randomly chosen, what is the probability that her pregnancy will last longer than 270 days?
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