Question

A study was conducted to investigate the effectiveness of three different methods to lower the blood pressure of individuals diagnosed with high blood pressure. The researcher was interested in the reduction of diastolic blood pressure in the subjects that were assigned to three groups. The first group took medication, the second group engaged in daily aerobic exercises, and the third group was prescribed a plant-based diet. The subjects were placed in their regiments for four weeks. Diastolic blood pressure was recorded before and after the four-week period.   The changes in diastolic blood pressure were recorded. Was there a significant difference between the methods?

Medication	Exercise	Diet
19	15	14
11	13	10
14	13	10
18	20	15
20	18	10
17	18	11
15	18	11
15	20	19
14	19	10
12	20	11
16	10	12
15	10	20
18	13	12
15	13	20
10	10	17
14	11	17
12	11	15
18	13	15
15	20	19
15	14	12
17	19	20
18	17	20
13	19	17
12	17	15
20	13	11
13	10	15
17	15	17
10	16	17
15	11	18
15	15	14
18	14	12
20	17	20
18	20	15
15	19	17
16	12	10
15	11	16
12	13	18

The appropriate test for this problem is:

a. one-way ANOVA

b. repeated measurements

The obtained statistic is:

a. F = 5.1

b. F = 1.5

c. F = 0.51

d. F = 0.15

The associated p value is:

a. .086

b. .861

c. .018

d. .681

Decision is:

a. reject the null

b. retain the null

Conclusion is:

a. the medication group changed most significantly

b. the exercise group changed most significantly

c. the diet group changed most significantly

d. no conclusion can be drawn

Answer 1

The appropriate test for this problem is:

a. one-way ANOVA

The obtained statistic is:

d. F = 0.15

The associated p-value is:

b. .861

Decision is:

b. retain the null

Conclusion is:

d. no conclusion can be drawn

The p-value is greater than 0.05 or significance value. That means we cannot reject the null hypothesis that there is no difference between the three procedures.