The Rejection Region for Testing the Hypotheses $H _ { 0 } : \mu =$

Short Answer

The rejection region for testing the hypotheses $H _ { 0 } : \mu =$ 80. $F _ { 1 } : \mu$ < 80. at the 0.10 level of significance is: $\begin{array}{|l|l|}\hline\text { A. } & z>1.96 \\\hline \text { B. } & z<0.90 \\\hline \text { C. } & z>-1.65 \\\hline \text { D. } & z<-1.28 \\\hline\end{array}$