The mean and the standard deviation of the sample of 100 bank customer waiting times are x = 5.16 and s= 2.335. (1) Calculate a t-based 95 percent confidence interval for u, the mean of all possible bank customer waiting times using the new system. (Choose the nearest degree of freedom for the given sample size. Round your answers to 3 decimal places.) The t-based 95 percent confidence interval is (2) Are we 95 percent confident that is less than 6 minutes?. interval is than 6.

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