Question

An 80% confidence interval for a proportion is found to be (0.12, 0.18). Whatis the sample proportion?

Answer 1

Solution

- To find the sample proportion, we simply take the average of both endpoints of the confidence interval.

- That is,

$\frac{0.12+0.18}{2}=\frac{0.3}{2}=0.15$

Final Answer

The answer is OPTION C