Perform two sample z test procedure using critical value method.

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5) A researcher finds that there is a positive correlation between number of hours a person sleeps the night before an exam (variable X) and their performance on the exam (variable Y). However, they are concerned that this relationship only exists because of conscientiousness (variable Z). Specifically, conscientious people tend to get more sleep and also tend to perform well on tests. Using the data below, please determine where there is a relationship between hours of sleep one gets the night before an exam and performance on the exam after accounting for the role of conscientiousness (alpha = .05, two-tailed). sleep exam grade conscientiousness 6 63 2 66 4 1 60 2.5 4 75 3.5 90 9. 88 4.5 10 92 6 a) What type statistical analysis should you perform? Please explain your rationale b) Please state the null and alternative hypotheses c) Please write out the results and make a decision d) Please make a general conclusion (no stat talk)

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Chapter 11, Problem 10P

To determine

Perform two sample z test procedure using critical value method.

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5) A researcher finds that there is a positive correlation between number of hours a person sleeps the night before an exam (variable X) and their performance on the exam (variable Y). However, they are concerned that this relationship only exists because of conscientiousness (variable Z). Specifically, conscientious people tend to get more sleep and also tend to perform well on tests. Using the data below, please determine where there is a relationship between hours of sleep one gets the night before an exam and performance on the exam after accounting for the role of conscientiousness (alpha = .05, two-tailed). sleep exam grade conscientiousness 6 63 2 66 4 1 60 2.5 4 75 3.5 90 9. 88 4.5 10 92 6 a) What type statistical analysis should you perform? Please explain your rationale b) Please state the null and alternative hypotheses c) Please write out the results and make a decision d) Please make a general conclusion (no stat talk)

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