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The age when smokers first start from previous studies is normally distributed with a with a population standard deviation of 1.8 years old. A survey of smokers of this ge estimate if the mean age has changed. The sample of 35 smokers found that their m years old. Find the 90% confidence interval of the mean.

The age when smokers first start from previous studies is normally distributed with a with a population standard deviation of 1.8 years old. A survey of smokers of this ge estimate if the mean age has changed. The sample of 35 smokers found that their m years old. Find the 90% confidence interval of the mean.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The age when smokers first start from previous studies is normally distributed with a mean of 13 years old with a population standard deviation of 1.8 years old. A survey of smokers of this generation was done to estimate if the mean age has changed. The sample of 35 smokers found that their mean starting age was 14 years old. Find the 90% confidence interval of the mean. <Select an answer < Do not round in between steps. Round answers to at least 2 decimal places. Submit Question
Transcribed Image Text:The age when smokers first start from previous studies is normally distributed with a mean of 13 years old with a population standard deviation of 1.8 years old. A survey of smokers of this generation was done to estimate if the mean age has changed. The sample of 35 smokers found that their mean starting age was 14 years old. Find the 90% confidence interval of the mean. <Select an answer < Do not round in between steps. Round answers to at least 2 decimal places. Submit Question
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