9 The data given below are taken from a process of acceptable mean value 0 8.0 and unacceptable mean value 1 7.5 and

9 The data given below are taken from a process of acceptable mean value μ0  8.0 and unacceptable mean value μ1  7.5 and known standard deviation of 0.45.

Sample number x –
Sample number x –
1 8.04 11 8.11 2 7.84 12 7.80 3 8.46 13 7.86 4 7.73 14 7.23 5 8.44 15 7.33 6 7.50 16 7.30 7 8.28 17 7.67 8 7.62 18 6.90 9 8.33 19 7.38 10 7.60 20 7.44 Plot the data on a cumulative sum chart, using any suitable type of chart with the appropriate correction values and decision procedures.
What are the ARLs at μ0 and μ1 for your chosen decision procedure?