Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 14 - Statistical Process Control - Review - Chapter Quick Quiz - Page 708: 5


No, the process variation is not within statistical control.

Work Step by Step

The process variation is not within statistical control because the R chart has at least 8 consecutive points, all of which are positioned blow the centerline. Additionally, there are points lying beyond the upper control limit and a pattern which suggests that the ranges of the most recent samples have jumped in value.
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