Exercise 7 Interpreting Line Graphs

Exercise 7: Interpreting Line Graphs

1. What is the focus of the example Figure 7-1 in the section introducing the statistical

technique of this exercise?

 The focus of the example Figure 7-1 is a comparison of weight loss over 4 weeks

between a group consuming a low carbohydrate diet and another group

consuming a standard diet.

2. In Figure 2 of the Azzolin et al. (2013, p. 242) study, did the nursing outcome

activity tolerance change over the 6 months of home visits (HVs) and telephone calls?

Provide a rationale for your answer.

 Yes, the mean increased from 3.4 on HV1 to 4.2 at HV4.

3. State the null hypothesis for the nursing outcome activity

tolerance.

 There is no change in the nursing outcome activity tolerance.

4. Was there a significant difference in activity tolerance from the first home visit (HV1) to

the fourth home visit (HV4)? Was the null hypothesis accepted or rejected? Provide a

rationale for your answer.

 Yes, the activity tolerance increased significantly from HV1 to HV4.

 The null hypothesis is rejected because the p values are less than alpha which is set at