Suppose we randomly sample 8 people in Grade 9 and record their final average. We follow up with the same 8 people one year later, and record their Grade 10 final average. The results are presented. Final Average Grade 9 7673 66 95 75 78 96 93 Grade 10 75 80 70 93 81 90 88 79 We want to test whether the grades have improved for these 8 people between Grade 9 and Grade 10. What is the observed value of the test statistic corresponding to the appropriate hypothesis test? Answer:

Suppose we randomly sample 8 people in Grade 9 and record their final average. We follow up with the same 8 people one year later, and record their Grade 10 final average. The results are presented. Final Average Grade 9 7673 66 95 75 78 96 93 Grade 10 75 80 70 93 81 90 88 79 We want to test whether the grades have improved for these 8 people between Grade 9 and Grade 10. What is the observed value of the test statistic corresponding to the appropriate hypothesis test? Answer:

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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This problem is fill in the blank. Just choose the correct answers. Thank you for your help A psychologist is studying the self-image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, μ, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 85 and that the standard deviation is 10, but the psychologist believes that the value for the mean has increased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 95. Based on this information, answer the questions below. 1. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test? H0: (choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to. (choose one) 85, 95, or 10. H1: (Choose one) less than,…
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For this hypothesis test do you think the results would have been different if the values had first been separated by the gender of the subject? For example, if instead you tested the claim that the mean weight of the population of all male adults is greater than 80 kg. Explain your answer.
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