Statistics Solutions

(See Solution) A Store tells customers that an order will take six weeks (42 days). During recent months the owner has received several complaints that

Question: A Store tells customers that an order will take six weeks (42 days). During recent months the owner has received several complaints that the special orders are taking longer than 42 days. A sample of 12 special orders delivered in the last month showed that the mean waiting time was 51 days with a standard deviation of 8 days. At the .05 significance level, are customers waiting an average of more than 42 days?

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