Purpose of Assignment: to demonstrate the ability to test a null hypothesis on two independent groups, construct a confidence interval and report the results. Scenario: a study is conducted on the...

Extracted text: Purpose of Assignment: to demonstrate the ability to test a null hypothesis on two independent groups, construct a confidence interval and report the results. Scenario: a study is conducted on the effects of two medications (Drug A and Drug B) upon anxiety in two groups of participants. Two random samples of participants have been selected for the study - one group receiving Drug A and the other group receiving Drug B. After two weeks, the participants are measured on anxiety with the following results: Drug Drug 72.0 68.7 M 24 18 208 62 In SS Tasks 1. State the null hypothesis and alternative hypothesis in symbols. Use .05 as the alpha. 2. Compute the degrees of freedom. 3. Go to the t table and locate the critical regions. 4. Calculate the pooled variance. 5. Calculate the estimated standard error. 6. Compute the t statistic.


Extracted text: 7. Make a decision (reject the null/fail to reject the null). 8. Compute the 95% confidence interval. 9. Write the results as you would for reporting using the confidence interval for the effect size (not r- squared). (This does not mean provide an interpretation.)