Question:Sample                  Temp     1              Temp

2                  Temp 3                  Temp 4

1                                37.30                      36.50                      38.20                      36.10

2                                33.40                      35.80                      37.90                      36.20

3                                32.10                      34.80                      39.10                      35.30

4                                36.10                      37.20                      36.70                      34.20

5                                35.10                      38.60                      37.20                      33.60

6                                33.40                      34.50                      36.70                      32.40

7                                38.10                      39.20                      35.30                      32.70

8                                35.40                      36.20                      36.30                      34.30

9                                37.10                      39.40                      38.10                      36.20

10                             32.10                      34.00                      35.60                      36.10

Create the X-Bar and R Chart for this data and answer the following questions for each:

1)    What is the average (or mean) percent defectives?

2)    What are the upper and lower control limits (UCL and LCL)?

3)    Is the process in control? Why?

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