An insurance representative wants to determine if the proportions of women and men who buy different policy types are the same. The actual sales results for 50 women and 50 men
$\begin{array} { l l c c } & & \text { Policy A } & \text { Policy B } \ & \text { Women } & 18 & 32 \ \text { are: } & \text { Men } & 12 & 38 \end{array}$
Under the null hypothesis, what is the expected number of men who would buy Policy B?
A) 25
B) 30
C) 35
D) 50

Question

Quizplus · Accepted Answer

The expected number of men buying Policy B is calculated by multiplying the total number of men by the proportion of total sales that are Policy B. Total Policy B sales are 70 (32 women + 38 men), so the expected number for men is (50 men * 70 total Policy B sales / 100 total sales) = 35.

An Insurance Representative Wants to Determine If the Proportions of Women