SOLUTION: A college baseball coach read in a sports magazine that the average fastball speed of all the pitchers who competed last year in the college world series was 90.4 mph. The 16 pitch

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Question 136327: A college baseball coach read in a sports magazine that the average fastball speed of all the pitchers who competed last year in the college world series was 90.4 mph. The 16 pitchers who tried out for the school’s team this year averaged 88.2 mph, and the standard deviation was 3.4 mph. What is the value of the test statistic?
a. –25.9
b. –0.65
c. –2.59
d. 0.65

Answer by stanbon(48568) About Me  (Show Source):
You can put this solution on YOUR website!
A college baseball coach read in a sports magazine that the average fastball speed of all the pitchers who competed last year in the college world series was 90.4 mph. The 16 pitchers who tried out for the school’s team this year averaged 88.2 mph, and the standard deviation was 3.4 mph. What is the value of the test statistic?
a. –25.9
b. –0.65
c. –2.59
d. 0.65
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t(88.2) = (88.2-90.4)/[3.4/sqrt(16)] = -2.58823...
Answer: C
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Cheers,
Stan H.