Twenty-five women between the ages of 70 and 80 were randomly selected from the general populationof women their age to take part in a special program to decrease reaction time (speed). After thecourse, the women had an average reaction time of 688 milliseconds. Assume that the mean reactiontime for the general population of women of this age group is 700 milliseconds with a standard deviationof 300 milliseconds.(a) Compute a 95% confidence interval for u, the population mean reaction time for women who havetaken part in the program.(b) Perform a hypothesis test to decide whether the course had a significant effect on reaction times.

Sample size =25 Sample mean=688 Population mean=700 Standard deviation =300 We have to find a..95%…

Answered: ty-nive women between the ages of 70…

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 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, 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. Assuming that the standard deviation of SI scores for the population of all smokers is 80, what is the minimum sample size needed for the psychologist to be 99% confident that her estimate is within 10 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.) Explanation Check 2021 McGraw HI Education. All Rights Reserved Terms of Use PrivacyI Accessibility MacBook Air ** FI * FS 23 2$ 2 3 4 5 6. 8. Q W E Y P A S F G K C V B alt alt option command command option .. ..
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, μ, for the population of all smokers. She plans to take a random sample of SI scores for smokers and estimate μ via this sample. Assuming that the standard deviation of SI scores for the population of all smokers is 90, what is the minimum sample size needed for the psychologist to be 90% confident that her estimate is within 12 of μ?
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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 estimate 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. 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 95% confident that her estimate is within 12 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.)

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