Need to have completed today as the assignment expires at midnight. Problem 1 -

Question

Need to have completed today as the assignment expires at midnight.

Problem 1 -

Using samples of 200 credit card statements, an Auditor found the following:

---Sample Number: 1    2     3     4     5     6     7   8 9    10    11   12   13   14   15

Number of Errors:   27   25   36    34   26   27   18   26   23    32    33   27    31     26    26

Determine lower and upper control limits for the fraction of errors using three-sigma limits.

The Quality Control Manager at a Credit Card Collection Center is concerned about how many complaints the company is getting from customers. The following data were collected for 15 days of operation:

-------Sample Number: 1     2     3     4    5    6    7    8    9    10    11    12    13    14    15

Number of Complaints: 2     8     9     7     9    10    9     0     5     9      3       7       1      2       7

Determine lower and upper control limits for the number of complaints they should expect each day using three-sigma limits.

.077 , .2 .09 , .187 .065 , .212 .041 , .236 None of the Above

Explanation / Answer

1).041 , .236

2)1.022 , 10.71

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