The lengths of pregnancies are normally distributed with a mean of 270 days and a standard deviation of 15 days. a. In a letter to an advice column, a wife claimed to have given birth 309 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 309 days or longer. What does the result suggest? b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature.
The lengths of pregnancies are normally distributed with a mean of 270 days and a standard deviation of 15 days. a. In a letter to an advice column, a wife claimed to have given birth 309 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 309 days or longer. What does the result suggest? b. If the length of pregnancy is in the lowest 4%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature.
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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Question
The lengths of pregnancies are normally distributed with a mean of
270
days and a standard deviation of
15
days.a. In a letter to an advice column, a wife claimed to have given birth
309
days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting
309
days or longer. What does the result suggest?b. If the length of pregnancy is in the lowest
4%,
then the baby is premature. Find the length that separates premature babies from those who are not considered premature.Expert Solution
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