Chapter 8.1, Problem 16E

To determine

To find: the confidence level was used and explains the reasoning.

Answer to Problem 16E

99%

Explanation of Solution

Given:

  

Calculation:

  $\begin{array}{c}\frac{25}{25}=1\\ =100\%\end{array}$

The red lines under the curve are showing that the sample means which is not having the true population proportion. It is observed that there are zero sample from the 25 samples which is not having the true proportion and therefore 25 sample from the 25 samples is having the true population. The closest confidence level is 99%.