Question

The Brutus Gourmet Company produces delicious organic dog treats for canines with discriminating tastes. Management wants the box-filling line to be set so that the process average weight per packet is 127 grams. To make sure that the process is in control, an inspector at the end of the filling line periodically selects a random box of 8 packets and weighs each packet. When the process is in control, the range in the weight of each sample has averaged 10 gramsThe results from the last 5 samples are shown below:Sample Sample Average Sample Range1 124 92 134 83 126 14 127 85 135 7The LCLR = ______________ .

Answer 1

Answer:

Average range(R-bar) = Sum of the sample range for each sample/number of samples = (9+8+1+8+7) /5 = 33/5 = 6.6

Sample size = 8

For a sample size of 8 the factors for control limit for range (D3) = 0.136 (obtained from table of constraints for x-bar and R chart

LCL = R-bar × D3 = 6.6 × 0.136 = 0.90

Step-by-step explanation: