9-step Hypothesis Testing Procedure:

1. Evaluate the Data

2. Review Assumptions

3. State Hypotheses

4. Select the Test Statistic

5. Distribution of the Test Statistic

6. State the Decision Rule

7. Calculate the Test Statistic

8. Statistical Decision

9. Conclusion

Exercise 2:

For this exercise please recode the variable corresponding to the depressed state of mind into a dichotomous variable that has two groups: those who rated themselves as rarely depressed are scored 0, and those who rated themselves as sometimes to routinely depressed are scored 1. Using the new variable as the outcome measure, determine which of the following variables increase the odds of being depressed:

1. Smoking history: recoded into currently smoking = 1, and not currently smoking = 0.

2. Gender: Male = 0, Female = 1

3. Quality of life in the past month: recoded so that values 1 to 3 (sometimes to very unhappy) become 0, and 4 to 6 (sometimes to extremely happy) become 1.

4. Total score on the Inventory of Positive Psychological Attitudes scale (IPPA): Enter recoded smoking history and gender in the first block and recoded quality of life and total IPPA score in the second block.

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