Exhibit 18-5
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 18-5. $\sigma$ in this problem is
A)15
B)5.47
C)3.87
D)7.45

Question

Exhibit 18-5
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 18-5.  $\sigma$ in this problem is
A)15
B)5.47
C)3.87
D)7.45

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, $p = \frac{41}{60}$, and using this formula gives approximately 3.87.

Exhibit 18-5 Forty-One Individuals from a Sample of 60 Indicated σ\sigmaσ

Exhibit 18-5
Forty-One Individuals from a Sample of 60 Indicated $\sigma$