NSCI 3011 Assigned Reading #10 Effect of oral Mg supplementation on physical per
ID: 3311913 • Letter: N
Question
NSCI 3011 Assigned Reading #10 Effect of oral Mg supplementation on physical performance of healthy elderly women involved in a weekly exercise program: a randomized controlled trial) 1. Provide one example of an analysis that you think used an independent t test and one example of an analysis that you think used a paired t test. For each example, indicate which dependent variable was compared and identify the groups being compared. Table 1 (rows 5 and 6) shows changes in chair stands time and walking speed. If there were significant differences they were indicated in three columns labeled "Change," "Change" and "Between-group change." Explain the results presented in these three columns for the chair stands time and walking speed tests 2. Explain the meaning of a correlation coefficient of- 0.18 between changes in serum magnesium and chair stands times (Figure 2B). 3.Explanation / Answer
Q1.
Independent samples t test
To test the hypothesis that there are no differences in reported alcohol problems between men and women
The dependent variable is - reported alcohol problems (rated on a scale)
The groups being compared are - men and women.
Paired samples t test:
To test if the mean stock price of the stocks in 2016 is significantly different from the mean stock price of the same stocks in 2015
The dependent variable is - stock price of the stocks
The groups being compared are - their prices in 2016 and 2015
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