Exhibit 19-6
Forty-one individuals from a sample of 60 indicated they oppose legalized abortion. We are interested in determining whether or not there is a significant difference between the proportions of opponents and proponents of legalized abortion.
-Refer to Exhibit 19-6. $\sigma$ in this problem is
A)15
B)5.47
C)3.87
D)7.45

Question

Quizplus · Accepted Answer

The standard deviation $\sigma$ for a proportion is calculated using the formula $\sigma = \sqrt{np(1-p)}$, where $n$ is the sample size and $p$ is the sample proportion. Here, $n = 60$ and $p = \frac{41}{60}$. Calculating gives $\sigma \approx 3.87$.

Exhibit 19-6 Forty-One Individuals from a Sample of 60 Indicated σ\sigmaσ

Exhibit 19-6
Forty-One Individuals from a Sample of 60 Indicated $\sigma$