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Average length of time customers spent on waiting

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Reference no: EM132422140

Problem: The average length of time customers spent on waiting at ABC Store's check-out counter before a new P.O.S. system was installed was 5.5 minutes. A sample of 64 customers randomly selected at the check-out counter after the new P.O.S. system was installed showed that the average waiting time was 4.70 minutes with a sample standard deviation of 1.80 minutes. We wish to determine if there has been a significant decrease (from 5.5 minutes) in the average waiting time after the P.O.S. system was installed. Complete hypothesis test at 0.05 level of significance.

Reference no: EM132422140

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