A local doctors office tracks the number of insurance claim


Other Variable Control Charts

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1. A local doctor's office tracks the number of insurance claim rejections on a monthly basis. From the following information, create a chart for individuals with a moving-range chart. Interpret the chart.

Month

# of rejected claims

Nov.

42

Dec.

31

Jan.

58

Feb.

46

Mar.

58

Apr.

48

May

42

June

65

July

78

Aug

74

Sept.

58

Oct.

59

Nov.

45

Dec.

46

2. Eighteen successive heats of steel alloy are tested for Rockwell hardness. The resulting data are shown below. Setup control limits for the moving average and moving range charts for a sample size of n=4.

Heat

Hardness

Heat

Hardness

1

0.806

10

0.809

2

0.814

11

0.808

3

0.810

12

0.810

4

0.820

13

0.812

5

0.819

14

0.810

6

0.815

15

0.809

7

0.817

16

0.807

8

0.810

17

0.807

9

0.811

18

0.800

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Business Management: A local doctors office tracks the number of insurance claim
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