At Entrance C of the Football Stadium There Are 3 $µ_d$

Multiple Choice

At entrance C of the football stadium there are 3 swing gates for the spectators. On football Saturday, two high school students sit at this entrance and count the number of people who enter through each of the swing gates. They also write down the gender of these spectators. On Monday, during their statistics class, they wish to determine if men are more likely to enter through the middle swing gate than women. What is the appropriate parameter in this situation?

A) $µ_d$
B) $p_1$ - $p_2$
C) P
D) $µ_1$ - $µ_2$