Exhibit 21-4
Simple random sampling has been used to obtain a sample of size 50 from a population of size 500. The sample proportion was 0.7.
-Refer to Exhibit 21-4. The estimate of the standard error of proportion is
A)0.210
B)0.700
C)0.300
D)0.062

Question

Quizplus · Accepted Answer

The formula for estimating the standard error of proportion is:
SEp = sqrt(p(1-p)/n)
where p is the sample proportion and n is the sample size.

Plugging in the values given in the question:
SEp = sqrt(0.7(1-0.7)/50)
SEp = 0.062

Exhibit 21-4 Simple Random Sampling Has Been Used to Obtain a Sample