2. In a study of the life expectancy of 400 people in a certain geographic region, the mean age at death was 70 years, and the standard deviation was 5.1 years. If a sample of 50 people from this region is selected, what is the probability that the mean life expectancy will be less than 68 years?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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2. In a study of the life expectancy of 400 people in a certain geographic region, the
mean age at death was 70 years, and the standard deviation was 5.1 years. If a
sample of 50 people from this region is selected, what is the probability that the
mean life expectancy will be less than 68 years?
3. The average cholesterol content of a certain canned goods is 215 milligrams, and
Transcribed Image Text:2. In a study of the life expectancy of 400 people in a certain geographic region, the mean age at death was 70 years, and the standard deviation was 5.1 years. If a sample of 50 people from this region is selected, what is the probability that the mean life expectancy will be less than 68 years? 3. The average cholesterol content of a certain canned goods is 215 milligrams, and
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