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Test 15 - Hypot.
ENGL 121 Unit.
My Course - PS.
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QUESTION 4 - 1 POINT
Suppose a bowler claims that her bowling score is not equal to 150 points, on average. Several of her teammates do not elieve her, so the bowler decides to do a hypothesis test, at a \( 5 \% \) significance level, to persuade them. She bowls 22 james. The mean score of the sample games is 157 points. The bowler knows from experience that the standard deviatio or her bowling score is 18 points.
- \( H_{0}: \mu=150 ; H_{a}: \mu \neq 150 \)
- \( \alpha=0.05 \) (significance level)
Vhat is the test statistic ( \( \mathbf{z} \)-score) of this one-mean hypothesis test?
elect the correct answer below:
\[
\begin{array}{l}
\frac{7}{\frac{18}{\sqrt{22}}} \approx 1.82 \\
\frac{7}{\frac{78}{\sqrt{23}}} \approx 1.87 \\
\frac{-7}{\frac{18}{\sqrt{2}}} \approx-1.82 \\
\frac{-7}{\frac{18}{\sqrt{23}}} \approx-1.87
\end{array}
\]
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ESTION 5 - 1 POINT
nifer, a college student, would like to make the claim that the average amount that students spend on textbooks ea
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