Confidence intervals

Consider the following random sample of diameter measurements (in inches) of 12 softballs. 4.68, 4.7, 4.81, 4.78, 4.88, 4.82, 4.89, 4.88, 4.86, 4.75, 4.86, 4.83 Send data to calculator Send data to Excel If we assume that the diameter measurements are normally distributed, find a 99% confidence interval for the mean diameter of a softball. Then find the lower limit and upper limit of the 99% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. (If necessary, consult a list of formulas.) Lower limit: X ? Upper limit