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2g. What is the strength of the relationship? **Report your answer as a proportion with four decimal places.

Q18 : What are the hypotheses for the hypothesis test completed by the t.test( ) command above?

2a. If the teacher wants to test the prediction that the two groups will differ, how should the null and alternative hypotheses be stated?

PROBLEM 3 – Correlated groups t-test A researcher wants to test the effectiveness of Prozac on the well-being of depressed individuals. A researcher asks nine participants to complete a well-being survey the first day they start taking Prozac. The researcher then reassesses their well-being after being on the medication for six weeks. Higher scores indicate greater well-being. Use the data below to run a correlated groups t test to test the hypothesis that taking Prozac improves the participants well-being scores. Use this information to answer questions 3a-3x below.

1b. Suppose the researcher collects data from 10 students and finds they study on average 19.60 hours a week (SD = 7.0742). Use this information and the information in the problem description above to calculate the observed t-score. **Report your final answer to 4 decimal places. **To receive credit for this problem you need to submit a picture of your hand calculations. The picture should show the formulas you used and your hand calculations, including the intermediate steps.

A patient presents to the clinic with complaints of increased anxiety and states, “I feel like someone is following me.” The patient is restless. The initial vitals are: HR 126, BP 156/90. The patient has poor dentition and has several “poc” marks and open wounds to arms and cheeks. The nurse suspects chronic use of what substance? 

2b. Use the data in the table below to calculate the observed t-score for the independent groups t-test. **Report your answer to four decimal places. Frequent Praise Praise at the End 8 2 5 3 2 8 3 8 6 6 4 7 7 6

2i. What is the 95% confidence interval for the problem? **Report both values to four decimal places. to

3a. If a researcher wants to test the prediction that taking Prozac improves the participants well-being scores, what are the correct null and alternative hypotheses?