Question

The mean and the standard deviation of the sample of 65 customer satisfaction ratings in Table are 42.95 and 2.6424, respectively. Calculate a t-based 95 percent confidence interval for μ, the mean of all possible customer satisfaction ratings for the XYZ- Box video game system. Are we 95 percent confident that μ is at least 42, the minimal rating given by a very satisfied customer?


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  • CreatedMay 28, 2015
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