Question: A Quality Analyst wants to construct a control chart for determining whether errors in bank transactions are under control. She looked at samples of 1000

A Quality Analyst wants to construct a control chart for determining whether errors in bank transactions are under control. She looked at samples of 1000 transactions each week, for four weeks in a row. A transaction was considered defective, if the analyst detected any error in the transaction.

Week

Total Defectives

1

30

2

14

3

25

4

44

What are the upper and lower control limits for this control chart, using 3 sigma control limits?

.0436 and .0123

.3084 and .2516

None of the choices given

.3226 and .2374

.0387 and .0177

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