A researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05. What are the null and alternative hypotheses? What Z-score(s) corresponds to the alpha level? In other words, at what point(s) would we reject the null hypothesis? What is the effect size of the treatment using Cohen’s d?
A researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05. What are the null and alternative hypotheses? What Z-score(s) corresponds to the alpha level? In other words, at what point(s) would we reject the null hypothesis? What is the effect size of the treatment using Cohen’s d?
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 researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05.
- What are the null and alternative hypotheses?
- What Z-score(s) corresponds to the alpha level? In other words, at what point(s) would we reject the null hypothesis?
- What is the effect size of the treatment using Cohen’s d?
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