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1) A furniture retailer is studying the amount of time it takes their salespeople to arrange...

1) A furniture retailer is studying the amount of time it takes their salespeople to arrange for delivery. The retailer takes a sample of n = 25 times and computes a sample average of 5.2 minutes and a standard deviation of 2.4 minutes. b) Provide a 95% confidence interval on the standard deviation of the time required to arrange for delivery.

math   Statistics-And-Probability   
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nニ25 5.2+ 1.9.2.- 5, 2 ± 0.9408

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