Estimate the standard deviation of a Clayton Kershaw fastball with 95% confidence. See Problem 19.
Refer to Problem 19,
Clayton Kershaw of the Los Angeles Dodgers is one of the premier pitchers in baseball. His most popular pitch is a four-seam fastball. The data in the next column represent the pitch speed (in miles per hour) for a random sample of 18 of his four-seam fastball pitches.