A study was performed to evaluate a potential relationship between diastolic blood pressure (DBP) and exercise minutes per week in a random sample of 11 subjects aged 20 to 29 years.

The results were as follows:

Exercise (min/week) DBP (mm Hg)

10 80

20 73

30 81

40 83

50 77

60 75

70 78

80 77

90 76

100 72

110 73

Perform a simple linear regression analysis with the dependent variable, DBP, and independent predictor variable, Ex. min/week.

Assume normality and equal variance. Use = 0.05 (two-tailed) and assume 60% power.

State the null and alternative hypotheses for testing the slope.

List the critical value for testing the slope.

List the R²