Question 21 Problem 5: The table below summarizes baseline characteristics on pa
ID: 3392715 • Letter: Q
Question
Question 21
Problem 5: The table below summarizes baseline characteristics on patients participating in a clinical trial.
Characteristic
Placebo (n=125)
Experimental (n=125)
P
Mean (+ SD) Age
54 + 4.5
53 + 4.9
0.7856
% Female
39%
52%
0.0289
% Less than High School Education
24%
22%
0.0986
% Completing High School
37%
36%
% Completing Some College
39%
42%
Mean (+ SD) Systolic Blood Pressure
136 + 13.8
134 + 12.4
0.4736
Mean (+ SD) Total Cholesterol
214 + 24.9
210 + 23.1
0.8954
% Current Smokers
17%
15%
0.5741
% with Diabetes
8%
3%
0.0438
What are the hypotheses used to compare % females between groups?
H0: 1 = 2; H1: 1 2
H0: p1 = p2; H1: p1 p2
H0: µd=0; H1: µd 0
H0: Treatment and educational level are independent; H1: Treatment and educational level are not independent
Characteristic
Placebo (n=125)
Experimental (n=125)
P
Mean (+ SD) Age
54 + 4.5
53 + 4.9
0.7856
% Female
39%
52%
0.0289
% Less than High School Education
24%
22%
0.0986
% Completing High School
37%
36%
% Completing Some College
39%
42%
Mean (+ SD) Systolic Blood Pressure
136 + 13.8
134 + 12.4
0.4736
Mean (+ SD) Total Cholesterol
214 + 24.9
210 + 23.1
0.8954
% Current Smokers
17%
15%
0.5741
% with Diabetes
8%
3%
0.0438
Explanation / Answer
Option (B) correctly compares proportion of females in 2 groups.
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