Question: 3. a. Provide an example for a research scenario in which an independent sample t-test will be required to analyze the data. (5 points)

3. a. Provide an example for a research scenario in which an

3. a. Provide an example for a research scenario in which an independent sample t-test will be required to analyze the data. (5 points) b. Provide an example for a research scenario in which an independent sample t-test will be required to analyze the data. (5 points) 4. Psychologists wanted to test the effect of reading the Harry Potter series on tolerance. To test that, they took two samples of people who have never read the series. They had one sample read the entire series, and the second sample (the control group) read Lord of the Rings. They then had all their subject do a tolerance test the psychologists developed and compared the results of the two samples. a. What type of statistical test should be used? (4 points) b. What is the parameter of interest? Which statistic is used to estimate it? (4 points) c. What would be the test statistic? Which formula would be used to compute it? (4 points) d. How would the standard error be computed? Which formula would be used? Which formula for the variance/standard deviation would be used? (5 points) e. Which formula would you use to compute the estimated Cohen's d? (4 points) 5. A researcher wanted to see whether two different therapeutic protocols have different effects on anxiety. To test that, she took two samples of people suffering from anxiety, and each samples was treated with one of the protocols. Since she thought intelligence may affect the results, she used matching to control for its effect (i.e, each subject from sample 1 had a matching subject with the same intelligence in sample 2. a. What type of statistical test should be used? b. What is the parameter of interest? Which statistic is used to estimate it? c. What would be the test statistic? Which formula would be used to compute it? d. How would the standard error be computed? Which formula would be used? Which formula for the variance/standard deviation would be used? e. Which formula would you use to compute the estimated Cohen's d?

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