A certain drug is used to treat asthma. In a clinical trial of the drug, 22 of 256 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than $10 \%$ of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below.
\[
\begin{array}{|l|}
\hline \text { 1-Prop2Test } \\
\text { prop }< 0.1 \\
z=-0.750000000 \\
p=0.2266273524 \\
\hat{p}=0.0859375000 \\
n=256
\end{array}
\]

Left-tailed test
Two-tailed test
Right tailed test
b. What is the test statistic?
\[
z=\square
\]
(Denund in twe dorimal nlarac pe noondar)

Step 1 ：A certain drug is used to treat asthma. In a clinical trial of the drug, 22 of 256 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than $10 \%$ of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below.

Step 2 ：\[\begin{array}{|l|}\hline \text { 1-Prop2Test } \\text { prop }<0.1 \z=-0.750000000 \p=0.2266273524 \\hat{p}=0.0859375000 \n=256\end{array}\]

Step 3 ：Left-tailed test

Step 4 ：Two-tailed test

Step 5 ：Right tailed test

Step 6 ：What is the test statistic?

Step 7 ：\[z=\square\]

Step 8 ：(Denund in twe dorimal nlarac pe noondar)

Step 9 ：The test statistic is \(\boxed{-0.750000000}\)

Step 10 ：The test statistic is \(\boxed{-0.750000000}\)