Use the Following Information for Questions:
in a Random $p_1$

Multiple Choice

Use the following information for questions:
In a random sample of 50 men, 40% said they preferred to walk up stairs rather than take the elevator. In a random sample of 40 women, 50% said they preferred the stairs. The difference between the two sample proportions (men - women) is to be calculated.
-Which of the following choices correctly denotes the difference between the two sample proportions that is to be calculated?

A) $p_1$ - $p_2$ = 0.10
B) $\hat{p_1}$ - $\hat{p_2}$ = 0.10
C) $p_1$ - $p_2$ = -0.10
D) $\hat{p_1}$ - $\hat{p_2}$ = -0.10