If you arent sure if its correct dont answer i will thumbs down they already answered incorrect last time.

(a) Compute the mean of each sample. (Round answers to 3 decimal places, e.s. 15.250.) (b) Compute an estimate of the mean and standard deviation of the sampling distribution. (Round answers to 4 decimal ploces, es. 15.2500.) (c) Develop control limits for 3 standard deviations of the product diameter. (Round answers to 2 decimal ploces, e.8. 15.25.)