Over then past 5 years, the mean time for a warehouse to fill a buyer’s order...

Over then past 5 years, the mean time for a warehouse to fill a buyer’s order has been 25 minutes. Officials of the company believe that the length of time has increased recently, either due to a change in the workforce or due to a change in customer purchasing policies. The processing time (in minutes) was recorded for a random sample of 15 orders processed over the past month.

28 25 27 31 10 26 30 15 55 12 24 32 28 42 38

Questions:
(a). Please check the normality of the data.
(b). Please test the research hypothesis at the significance level α = 0.05.

Solutions

Expert Solution

orchestra answered 1 year ago

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