Author Question: A process that is assumed to be in control with limits of 89 +/- 2 had sample averages of the ... (Read 61 times)

audragclark · **on:** Dec 3, 2019

Question 1

Red Top Cab Company receives multiple complaints per day about driver behavior. Over 9 days the owner recorded the number of calls to be 3, 0, 8, 9, 6, 7, 4, 9, 8. What is the upper control limit for the c-chart?
◦ 0.00
◦ 9.03
◦ 8.45
◦ 24.00
◦ 13.35

Question 2

A process that is assumed to be in control with limits of 89 +/- 2 had sample averages of the following— 87.1, 87, 87.2, 89, 90, 89.5, 88.5, and 88. Is the process in control?
◦ Yes.
◦ No, one or more averages exceeded the limits.
◦ Not enough information to tell.
◦ No, two or more consecutive points are very near the lower (or upper) limit.
◦ No, there is a distinguishable trend.

bpool94 · **Reply #1 on:** Dec 3, 2019

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