math 510 hw

Country Codes

Cycle Time

In this assignment you will create control charts for the following data for each country code.

1

65

1. Compute the average cycle time for each country code.

1

53

2. Compute the moving range for each country code.

1

46

3. Compute the confidence interval for each using the average cycle time plus or minus the product of 2.66 times the average moving range for each country code.

1

45

4. Turn in the spreadsheet with calculations.

1

66

5. Does the OTR time appear to be stable?  Why or why not?

1

45

6. If you were to use a control chart to evaluate stability, which chart would you use?  Why?

1

31

7. What can you learn about the distribution of the installation process? 

1

31

8. Does it appear that the country has an impact on installation time? Why or why not?

1

32

1

65

1

50

1

42

1

30

1

42

1

20

1

75

1

52

1

40

1

44

1

87

1

86

1

45

1

75

1

56

1

75

Country Codes

Cycle Time

5

68

5

64

5

70

5

75

5

70

5

50

5

50

5

75

Country Codes

Cycle Time

6

64

6

36

6

69

6

35

6

45

6

47

6

46

6

46

Country Codes

Cycle Time

7

45

7

56

7

41

7

40

7

60

7

53

7

26

7

50

7

30

7

61

7

88

7

42

7

44

7

40

7

53

7

53

7

48

Country Codes

Cycle Time

8

43

8

60

8

33

8

42

8

46

8

47

Country Codes

Cycle Time

14

56

14

84

14

46

14

56

14

42

Country Codes

Cycle Time

17

26

17

25

17

21

17

35

17

62

17

46

17

45