The mean and the standard deviation of the sample of 100 bank customer waiting times are x = 5.01 and s = 2.116. Calculate a t-based 5 percent confidence interval for mu, the mean of all possible bank customer waiting times using the new system. Are we 95 percent confident that I1/4 is less than 5 minutes?. (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