In a local community, assume ages are normally distributed. To estimate the average age of people in the community, a sample of 25 people are taken. The mean of these sample values is 52. The upper bound of the 90% confidence interval for the mean age is 60.4. What is the lower bound for the 90% confidence interval? Round your answer to one decimal place.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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In a local community, assume ages are normally distributed. To estimate the average age of people in the community, a sample of
25 people are taken. The mean of these sample values is 52. The upper bound of the 90 % confidence interval for the mean age
is 60.4. What is the lower bound for the 90% confidence interval? Round your answer to one decimal place.
Transcribed Image Text:In a local community, assume ages are normally distributed. To estimate the average age of people in the community, a sample of 25 people are taken. The mean of these sample values is 52. The upper bound of the 90 % confidence interval for the mean age is 60.4. What is the lower bound for the 90% confidence interval? Round your answer to one decimal place.
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