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MATH 225N: Week 7 Assignment, Hypothesis Test for the Mean-Polution Standard Deviation (Q&A) Latest Updated 2023
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---21abril 20232022/2023A+
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Jamie, a bowler, claims that her bowling score is less than 168 points, on average. 
Several of her teammates do not believe her, so she decides to do a hypothesis 
test, at a 1% significance level, to persuade them. She bowls 17 games. The mean 
score of the sample games is 155 points. Jamie knows from experience that the 
standard deviation for her bowling score is 19 points. 
H0: μ≥168; Ha: μ<168 
α=0.01 (significance level) 
What is the test statistic ( z-score) o...
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