A baseball pitcher's most popular pitch is a four-seam
fastball. The data below represent the pitch speed (in miles per
hour) for a random sample of of his four-seam fastball
pitches.
85.5, 88.5, 93.6, 92.5, 88.4, 92.5, 86.3, 93.1, 89.5, 91.9,
87.8, 90.8, 87.2, 87.5, 90.5
Construct and interpret a 95% confidence interval for the
mean pitch speed of the pitcher's four-seam fastball.
Select the correct choice below and, if necessary,
fill in the answer boxes to complete your choice.