seminoleryan6024 seminoleryan6024

21-11-2022
Mathematics

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a company claims that the average time a customer waits on hold is less than 5 minutes. a random sample of 28 customers shows a mean wait time of 4.78 minutes with a sample standard deviation of 1.8 minutes. test the company's claim at a 1% (.01) level of significance. what is your conclusion?

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