6.3. The time to make beds at a motel should fall into an agreed-on range of times....

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6.3. The time to make beds at a motel should fall into an agreed-on range of times. A sample of four maids was selected, and the time needed to make a bed was observed on three different occasions:

Service Time, Sec.

Maid Sample 1 Sample 2 Sample 3 Ann 120 90 150 Linda 130 110 140 Marie 200 180 175 Michael 165 155 140

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