Reference no: EM131555290

The following samples have been taken from an on-going process. Use these values to create both an X bar and an R chart, and then answer the questions below.

Sample 1: 56 48 53 58 52

Sample 2: 50 59 57 54 54

Sample 3: 61 59 56 55 58

Sample 4: 57 51 47 57 50

Sample 5: 50 49 57 55 56

Sample 6: 56 55 60 58 54

1) What is the value of the centerline for an X bar chart?  (Round to two decimal places)

2) The upper control limit for the X bar chart is:

3) The lower control limit for the X bar chart is:

4) The upper control limit for the R chart is:

5) The lower control limit for the R chart is: