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The mean age when smokers first start is 15 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly decreased. A survey of smokers of this generation was done to see if the mean age has decreased. The sample of 30 smokers found that their mean starting age was 12.3 years old. What are the correct hypotheses? Họ: Select an answer O ? 9 years Hạ: Select an answer e ? O years The test is: O One-tailed Two-tailed

The mean age when smokers first start is 15 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly decreased. A survey of smokers of this generation was done to see if the mean age has decreased. The sample of 30 smokers found that their mean starting age was 12.3 years old. What are the correct hypotheses? Họ: Select an answer O ? 9 years Hạ: Select an answer e ? O years The test is: O One-tailed Two-tailed

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
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The mean age when smokers first start is 15 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly decreased. A survey of smokers of this generation was done to see if the mean age has decreased. The sample of 30 smokers found that their mean starting age was 12.3 years old. What are the correct hypotheses? Họ: Select an answer ? years Ha: Select an answer ? years The test is: O One-tailed O Two-tailed
Transcribed Image Text:The mean age when smokers first start is 15 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly decreased. A survey of smokers of this generation was done to see if the mean age has decreased. The sample of 30 smokers found that their mean starting age was 12.3 years old. What are the correct hypotheses? Họ: Select an answer ? years Ha: Select an answer ? years The test is: O One-tailed O Two-tailed
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