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EXERCISE 31 t-TEST FOR DEPENDENT GROUPS | | |
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EXERCISE 31 Questions to be Graded 1. What are the two groups whose results are reflected by the t ratios in Tables 2 and 3?
The t ratios in tables 2 and 3 represent results between the pretest and 3 month measures and the pretest and 6 months measures for program effects on cardiovascular risk factors (table 2) and Program effects on health behaviors (table 3).
2. Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest and 3 months outcomes? Is this t ratio statistically significant? Provide a rationale for your answer.
The t ratio of 4.14 represent the greatest relative or standardized difference between the pretest and 3 months outcomes. Yes, it is significant because as indicated by the asterisk, p <0.05 is the least acceptable value for statistical significance. 3. Which t ratio listed in Table 3 represents the smallest relative difference between the pretest and 3 months? Is this t ratio statistically significant? What does this result mean?
The t ratio of -0.65 represents the smallest relative difference between the pretest and 3 months outcomes. This ratio does not have an asterisk next to it in the table which according to the footnotes the asterisk is said to represent p < 0.05 the least stringent acceptable value for statistical significance. 4. What are the assumptions for conducting a t-test for dependent groups in a study? Which of these assumptions do you think were met by this study?
The assumptions for conducting a t-test for dependent groups in a study are to help provide data would show if the effects of the treatment, or in this case health promotion, would make a difference in the overall health of the individuals during the pre, 3 month, and 6 month time tables. I believe that the assumption that the overall

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