he table below summarizes baseline characteristics on patients participating in
ID: 3152567 • Letter: H
Question
he table below summarizes baseline characteristics on patients participating in a clinical trial.
Characteristic
Placebo (n=125)
Experimental (n=125)
P-value
Mean (+ SD) Age
54 + 4.5
53 + 4.9
0.0456
% Female
39%
52%
0.0289
Education
0.0986
Completed College
39%
42%
Mean (+ SD) Total Cholesterol
214 + 24.9
210 + 23.1
0.154
% Current Smokers
17%
15%
0.5741
% with Diabetes
8%
3%
0.0438
a)Write the hypotheses, using correct symbol, to compare mean age between groups. (No calculations – just H0, Ha)
b)Write the hypotheses, using correct symbol, to compare % females between groups. (No calculations – just H0, Ha)
c)Write the hypotheses, using correct symbol, to compare % of college graduates between groups. (No calculations – just H0, Ha)
d)Are there any statistically significant differences in baseline characteristics between treatment groups at significance level of 0.05? If yes, identify the characteristics that are statistically significantly different
Characteristic
Placebo (n=125)
Experimental (n=125)
P-value
Mean (+ SD) Age
54 + 4.5
53 + 4.9
0.0456
% Female
39%
52%
0.0289
Education
0.0986
Completed College
39%
42%
Mean (+ SD) Total Cholesterol
214 + 24.9
210 + 23.1
0.154
% Current Smokers
17%
15%
0.5741
% with Diabetes
8%
3%
0.0438
Explanation / Answer
a)Write the hypotheses, using correct symbol, to compare mean age between groups. (No calculations – just H0, Ha)
Ho : miu 1 = miu 2
H1 : miu 1 is not equal to miu 2
b)Write the hypotheses, using correct symbol, to compare % females between groups. (No calculations – just H0, Ha)
Ho : p1 = p2
H1 : p1 is not equal to p2
c)Write the hypotheses, using correct symbol, to compare % of college graduates between groups. (No calculations – just H0, Ha)
Ho p1 = p2
H1 p1 is not equal to p2
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