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A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estim the mean SI score, µ, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate u via this sample. Assum that the standard deviation of SI scores for the population of all smokers is 85, what is the minimum sample size needed for the psychologist to be 90% confident that her estimate is within 20 of µ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)

A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estim the mean SI score, µ, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate u via this sample. Assum that the standard deviation of SI scores for the population of all smokers is 85, what is the minimum sample size needed for the psychologist to be 90% confident that her estimate is within 20 of µ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)

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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A psychologist is studying the self images of smokers which she measures by the self image (SI) score from a personality inventory.
A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estimate the mean SI score, u, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate u via this sample. Assuming that the standard deviation of SI scores for the population of all smokers is 85, what is the minimum sample size needed for the psychologist to be 90% confident that her estimate is within 20 of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) Check Save For Later Submit Assignm 2021 McGraw-Hill Education Al Rights Reserved. Terms of UseI Privacy Acces hp DO C)
Transcribed Image Text:A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estimate the mean SI score, u, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate u via this sample. Assuming that the standard deviation of SI scores for the population of all smokers is 85, what is the minimum sample size needed for the psychologist to be 90% confident that her estimate is within 20 of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) Check Save For Later Submit Assignm 2021 McGraw-Hill Education Al Rights Reserved. Terms of UseI Privacy Acces hp DO C)
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