Question: Chapter 6S Practice Worksheet Processing times for new accounts at a bank are shown in the following table in minutes. Observations 1 2 3 4

Chapter 6S Practice Worksheet

  1. Processing times for new accounts at a bank are shown in the following table in minutes.

Observations

1

2

3

4

Sample

1

10.2

9.9

9.8

10.1

2

10.3

9.8

9.9

10.4

3

9.7

9.9

9.9

10.1

4

9.9

10.3

10.1

10.5

5

9.8

10.2

10.3

9.7

  1. What is the mean for each sample?
  1. b. What is the range for each sample?

c. What is the grand mean?

d. What is R?

e. What are the upper and lower control limits for a mean control chart?

f. Do the results of the mean control chart suggest the process is in control?

g. What are the upper and lower control limits for a range chart?

h. Do the results of the range control chart suggest the process is in control?

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