Question: The following sample information was obtained by taking four doughnuts per hour for twelve hours from Fawcett Bakerys doughnut process and weighing them: For the

The following sample information was obtained by taking four doughnuts per hour for twelve hours from Fawcett Bakery’s doughnut process and weighing them:

HOUR WEIGHT (GRAMS) HOUR WEIGHT (GRAMS) 110, 105, 98, 100 79, 102,

For the data shown above

a. Find the x and R for each sample.

b. Find the x and R for the twelve samples.

c. Find the 3-sigma UCL and LCL for the mean and range charts.

d. Does the process look to be in statistical control. Why or why not?

HOUR WEIGHT (GRAMS) HOUR WEIGHT (GRAMS) 110, 105, 98, 100 79, 102, 100, 104 100, 102, 100, 96 94, 98, 99, 101 98, 104, 97, 100 104, 97, 99, 100 89, 102, 101, 99 100, 101, 98, 96 98, 95, 101, 100 99, 100, 97, 102 102, 97, 100, 101 98 100, 100, 97 3 4 10 12

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