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The mean and the standard deviation of the sample of 100

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The mean and the standard deviation of the sample of 100 bank customer waiting times in Table 1.8 are (xbar=5.49) and s=2.317. Calculate a t-based 95 percent confidence interval for U, the mean of all possible bank customer waiting times using the new system. Are we 95 percent confident that U is less than six minutes?

Reference no: EM13614677

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