Answer to Question #142956 in Statistics and Probability for Margaret

Question

Consider a population proportion 0.68. The standard error for proportion for n=20 is
1. 0.0109
2. 0.1043
3. 0.2176
4. 0.1404
5. 0.034

Answer 1

The standard error of a sample proportion can be calculated as:

$\sqrt{\frac{p(1-p)}{n}}$

given: p= 0.68, n= 20

Substitute the values

standard error= $\sqrt{\frac{0.68(1-0.68)}{20}}$ = 0.104307