Question 464819: a researcher wishes to try three different techniques to lower blood pressure of individuals with high blood pressure. the subjects were randomly assigned to three groups, first group takes medication, the second group exercises and the third group follows a special diet. after four weeks, the reduction in each person's blood pressure was recorded. using the data below, test at 5% level of significant the claim that there are no difference among the means.
Medication Exercise Diet
10 6 5
12 8 9
8 4 12
16 2 8
14 2 4
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a researcher wishes to try three different techniques to lower blood pressure of individuals with high blood pressure. the subjects were randomly assigned to three groups, first group takes medication, the second group exercises and the third group follows a special diet. after four weeks, the reduction in each person's blood pressure was recorded. using the data below, test at 5% level of significant the claim that there are no difference among the means.
Medication Exercise Diet
10 6 5
12 8 9
8 4 12
16 2 8
14 2 4
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Ho: the means are all equal
Ha: at least one of the means is different
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Run an ANOVA against the 5 x 3 matrix of data to get:
F = 8.059
p = 0.006
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Conclusion: Since the p-value is less than 5% reject
Ho at the 5% significance level.
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Cheers,
Stan H.
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