Question

An 80% confidence interval for a proportion is found to be (0.27, 0.33). What is the sample proportion?

Answer 1

Solution

For this case the confidence interval is given by:

(0.27; 0.33)

We can find the estimaed proportion in the following way:

$p=\frac{0.27+0.33}{2}=0.30$

then the sample proportion would be 0.30