Exercise 29 Statistics.

Topics: Statistical hypothesis testing, Statistics, Statistical significance Pages: 2 (513 words) Published: January 19, 2013
E■ EXERCISE 29 Questions to be Graded Exercise 29

Name: _Amita Pradhan__________________________________________________ Class: _______________________ Date: 01/18/2013

1. Were the groups in this study independent or dependent? Provide a rationale for your answer.

The groups in this study are independent or unrelated groups that are formed by the random assignment of subjects to the treatment and comparison groups. Groups are selected from two different settings, two different points in time and are not matched in any way.

2. t –3.1 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer. t= -3.15 describes the difference between women and men for Mental Health variable in this study. This value is significant since the t-test yields a p value, which is .002 less than alpha .05, it can cause the null hypothesis to be rejected.

3. Is t –1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this study.

t –1.99 describes the difference in health functioning between women and men after a MI. It is significant on this study as the P value is 0.049 which is close and still less to the alpha 0.05 which is enough evidence to reject to the null hypothesis.

4. Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study? Is this t ratio significant? Provide a rationale for your answer.

The mental health t-ratio indicates the largest difference between the males and females post MI in this study. The t -score is -3.15. This t- ratio is significant since it is causing the p value to be significantly low, less than the alpha 0.05.

5. Consider t –2.50 and t –2.54. Which t ratio has the smaller p value? Provide a rationale for your answer. What does this result mean?

The t ratio with -2.54 has the smaller p value since larger the...
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