# T-test for dependent groups

Not what you're looking for?

See the attached file(s).

Questions: t-test for dependent groups

1. What are the two groups whose results are reflected by the t ratios in Tables 2 and 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.

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?

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?

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?

6. What is the smallest, significant t ratio listed in Table 2? Provide a rationale for your answer.

7. Why are the larger t ratios more likely to be statistically significant?

8. Did the health-promotion program have a statistically significant effect on Systolic blood pressure (BP) in this study? Provide a rationale for your answer.

9. Examine the means and standard deviations for Systolic BP at pretest, 3 months (completion of the treatment), and 6 months. What do these results indicate? Are these results clinically important? Provide a rationale for your answer.

10. Is this study design strong or weak? Provide a rationale for your answer.

##### Purchase this Solution

##### Solution Summary

The solution discusses the t-test for dependent groups.

##### Solution Preview

■ EXERCISE 3Questions t-test for dependent groups

1. What are the two groups whose results are reflected by the t ratios in Tables 2 and 3?

Table 2 describes the health promotion program's effects on cardiovascular risk factors for a convenient sample of 21 elderly women.

Table 3 describes the health promotion program's effects on health behaviors for a convenient sample of 21 elderly women.

2. Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest and 3 months outcomes?

The t ratio corresponding to the variable Total risk score represents the greatest relative or standardized difference between the pretest and 3 months outcomes.

Is this t ratio statistically significant?

This t ratio is statistically significant, since the p-value is less than 0.05.

Provide a rationale for your answer.

Since the observed significance (p-value) is less than the significance level, we can conclude that the t ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.