Suppose a hypertension trial is mounted and 18 participants are randomly assigne

Question

Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the comparison treatments. Each participant takes the assigned medication and their systolic blood pressure (SBP) is recorded after 6 months on the assigned treatment. Is there a difference in mean SBP among the three treatment groups at the 5% significance level? The data are as follows. Placebo 134 143 148 142 150 160 Standard Treatment New Treatment 124 114 133 125 128 115 121 124 122 128 Step 4. Compute the test statistic. The ANOVA table is presented as below. You should be able to figure out values in the numbered cells with information provided in the question statement and the table above: Source Between-Group Within-Group Total Sum of Squares 237 846.2 3222.9 df Mean Sqaure 6.8 What is the between-group mean square, that is, value in Cell (4)? a. 1188.4 b.158.5 c. 423.1 d. 1611.5

Explanation / Answer

1) between group mean square =2376.8/2=1188.4

option A

2)

df within =total observation-number of treatment =18-3 =15

option C is correct

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