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checkitout checkitout
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6 years ago
A pizza delivery service wants to track their delivery times. They take eight samples of four deliveries and record the following data. What are the upper and lower control limits of their R-chart?
 
  Sample  1 2 3 4 5 6 7 8
  Item 1 21.1 20.2 24.1 22.6 21.2 20.9 22.4 20.9
  Item 2 21.7 20.6 21.7 21.7 24.1 23.5 24.6 24.7
  Item 3 23.0 24.5 23.2 23.0 20.6 22.8 23.4 22.8
  Item 4 20.3 23.5 24.4 25.0 20.7 23.2 23.3 24.5
 
  A) 24.9, 20.3
  B) 7.2, 0.0
  C) 3.1, 0.0
  D) 22.6, 0.0
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alohacharlesalohacharles
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6 years ago
You make an excellent tutor!
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Just got PERFECT on my quiz
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Thanks
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