A product manager has conducted a customer

Question # 00624107 Posted By: shortone Updated on: 12/03/2017 09:38 PM Due on: 12/04/2017
Subject Computer Science Topic Algorithms Tutorials:
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1.) A product manager has conducted a customer satisfaction survey of

30 customers on a scale of 1 to 5. The survey data is shown below. Calculate the mean and standard deviation of the survey and plot a histogram of the data. Does the distribution approximate Normal?

Customer

Satisfaction rating

1

4

2

3

3

2

4

5

5

5

6

2

7

1

8

4

9

3

10

4

11

4

12

5

13

3

14

3

15

2

16

1

17

5

18

3

19

4

20

3

21

4

22

2

23

4

24

4

25

3

26

3

27

3

28

2

29

2

30

3

2.) A customer relationship manager decided to track customer complaints as part of his ongoing customer satisfaction improvement program. After collecting data for two months, their check sheet appears as follows:

Type of Problem

Frequency

(number of times)

Call went to voice mail

8

Items damaged when received

21

Literature not in the box

9

Parts missing

13

Unit not working

2

Delivery was late

3

Construct a Pareto chart including the cumulative % frequency. What is the cumulative percentage of the two leftmost bars?

3.) A quality control engineer monitors the quality of a cylinder production line. He regularly selects a sample of 5 units and measures the diameters. The specification requires the diameter to be 6 inches plus/minus 0.1 inch. The following is a record of the measurements. Is the production process in control? Please use X bar and R charts to make an assessment.

Sample

item 1

item 2

item 3

item 4

item 5

1

6.10

6.15

5.35

5.98

5.95

2

6.35

6.02

6.20

6.10

5.70

3

5.85

5.90

6.20

6.12

6.08

4

6.00

5.80

5.70

6.04

6.17

5

6.15

5.60

6.25

5.99

6.01

6

6.13

6.05

5.89

6.00

5.87

7

5.88

6.03

5.76

6.1 3

6.00

8

6.12

5.45

6.15

6.04

5.91

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  1. Tutorial # 00622811 Posted By: shortone Posted on: 12/03/2017 09:38 PM
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