Floretta, a pitcher, claims that her pitch speed is less than46

miles per hour, on average. Several of her teammates do not believe her, so she decides to do hypothesis test, at a5%

significance level, to persuade them. She throws24

pitches. The mean speed of the sample pitches is37

miles per hour. Floretta knows from experience that the standard deviation for her pitch speed is5

miles per hour.

• H
• 0
• :46
• ;H
• a
• :<46
• =0.05
• (significance level)

What is the test statistic (z

-score) of this one-mean hypothesis test, rounded to two decimal places?

Provide your answer below: