# Exercise 31 Hlt 362v

**Topics:**Normal distribution, Standard deviation, Statistics

**Pages:**3 (681 words)

**Published:**October 21, 2012

Date: ___

□ 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?

Table 2 reflects the Health Promotion Program’s effects on cardiovascular risk factors and Table

3 is reflective of the program’s effects on health behavior.

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. 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 is 0.80. This value is not statistically significant since it is less than the tabulated value of 1.96. This is indicative of the program having no effect on health behaviors. 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?

Several assumptions for t-test for dependent/matched groups in a study are applied. First, it is assumed that the difference between the two groups of the dependent t-test is approximately or normally distributed. Second, the dependent variable is interval or ratio (continuous in nature). Third, any independent variable consists of one group or two “matched pair” groups. Finally, all subjects are assumed to have been surveyed the same and data collection was unbiased. The assumption that was met in this study is the normal distribution. 5.Compare the 3 months and 6 months t ratios for the variable Exercise from Table 3. What is your conclusion about the long-term effect of the health-promotion intervention on Exercise in this study? After comparing the t-ratios for the Exercise variable, I conclude that there is an effect on long term exercise and health behaviors. 6.What is the...

Please join StudyMode to read the full document