A random sample of 150 people was taken from a very large population. Ninety of the people in the sample were females. The standard error of the proportion of females is _____.
A) .0016
B) .2400
C) .1600
D) .0400

Question

Quizplus · Accepted Answer

The standard error of the proportion is calculated using the formula SE = sqrt(p(1-p)/n), where p is the sample proportion and n is the sample size. Here, p = 90/150 = 0.6, and n = 150. So, SE = sqrt(0.6 * 0.4 / 150) = 0.0400.

A Random Sample of 150 People Was Taken from a Very