Ball bearing manufacturing is a highly precise business in which minimal part variability is critical. Large variances
Question:
Ball bearing manufacturing is a highly precise business in which minimal part variability is critical. Large variances in the size of the ball bearings cause bearing failure and rapid wearout. Production standards call for a maximum variance of .0001 inches2. Gerry Liddy has gathered a sample of 15 bearings that shows a sample standard deviation of .014 inches.
a. Use α = .10 to determine whether the sample indicates that the maximum acceptable variance is being exceeded.
b. Compute the 90% confidence interval estimate of the variance of the ball bearings in the population.
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Related Book For
Essentials Of Statistics For Business & Economics
ISBN: 9780357045435
9th Edition
Authors: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Question Posted: