Math Solutions

Solution: One of the major measures of the quality of service provided by organization is the speed at which it responds to customer complaints. A large

Question: One of the major measures of the quality of service provided by organization is the speed at which it responds to customer complaints. A large family held department store selling furniture and flooring, including carpeting had undergone a major expansion in the past several years. In particular, the flooring department has expanded from two installation crews to an installation supervisor, a measurer , and 15 installation crews. During a recent year there were 50 complaints concerning carpeting installation. We picked up a sample of 25 observations. the following sample data represents the number of days between the receipt of the complaint and the resolution of the complaint.

5 35 31 27 27 11 19
29 35 31 26 5 12 32
29 28 29 26 25 27 39
22 36 26 20

The installation supervisor claims that the mean number of days between the receipt of the complaint and the resolution of the complaint is 20 days or less. At the 10% level of significance, is there evidence that the claim is not true.

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