Chapter 9.2, Problem 9.34E

To determine

To find null and alternative hypotheses.

Answer to Problem 9.34E

  $\begin{array}{l}{H}_0:p=0.12\\ H_a:p<0.12\end{array}$

Explanation of Solution

Given:

The claim is the 12% of all adults in the United States are left-handed.

The claim can be either in null or alternative hypothesis. Therefore, in this case, the null and alternative hypotheses:

  $\begin{array}{l}{H}_0:p=0.12\\ H_a:p<0.12\end{array}$