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Question
A retail store manager is trying to improve and control the rate at which cashiers sign customers up
for store credit cards. The manager takes several samples of size 50. He finds that each sample of 50 contained 5 credit card signups on average. Find p-bar and 99.73% control limits.
Answer
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Q:
Weight Day
Package 1
Package 2
Package 3
Package 4 Monday
23
22
23
24 Tuesday
23
21
19
21 Wednesday
20
19
20
21 Thursday
18
19
20
19 Friday
18
20
22
20 (a) If he sets an upper control limit of 21 and a lower control limit of 19 around the target value of twenty ounces, the control chart is based on what value of z?
(b) With the UCL and LCL of part a, what do you conclude about this processis it in control?
Answer:
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C) 550% of the throughput time
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