Question: QUESTION 4 (a) The operations manager randomly selects and weighs 5 boxes of noodles at regular interval from a production plant. The weights are measured

QUESTION 4 (a) The operations manager randomly

QUESTION 4 (a) The operations manager randomly selects and weighs 5 boxes of noodles at regular interval from a production plant. The weights are measured in grams, as presented in the table below. The population process standard deviation, is 2. SAMPLES 1 2 3 4 5 6 10 10 9 11 12 10 9 9 8 8 10 11 9 8 10 12 11 9 8 10 ON 9 10 12 8 11 11 12 9 10 12 10 (1) Calculate mean of the sample mean [3 Marks] (11) If z= 3, what are the control limits for the mean chart? [4 Marks] (111) What are the control limits for the range chart? (D3= 0, D4= 2.115) [4 Marks] (iv) Is the process in control? [2 Marks)

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