Question 21 Problem 5 The table below summarizes baseline ch

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 = p_2; H₁: p₁ p₂

H₀: µ_d=0; H₁: µ_d 0

H₀: Treatment and educational level are independent; H₁: Treatment and educational level are not independent

Solution

Option (B) correctly compares proportion of females in 2 groups.