Suppose that you wanted to determine if the males in your sales force differed from the females in your sales force in the proportion of sales that they made to mass merchandiser chains.Your data show that the 80 males had 40% of their sales to these chains,while the 60 females had 25% of their sales to these chains.For these data,the standard error of the difference in proportions is approximately:
A)0.08
B)0.15
C)0.02
D)1.67

Question

Quizplus · Accepted Answer

The standard error of the difference in proportions is calculated using the formula: SE = sqrt[(p1(1-p1)/n1) + (p2(1-p2)/n2)], where p1 and p2 are the sample proportions and n1 and n2 are the sample sizes. Plugging in the values: SE = sqrt[(0.4(0.6)/80) + (0.25(0.75)/60)] ≈ 0.08.

Suppose That You Wanted to Determine If the Males in Your