For a particular process that is in good statistical control, the mean standard deviation value, sbar, is 0.795. Calculate the estimate for the population standard deviation (the Shewhart standard deviation) if the sample size is 6. Can someone explain to me how to figure this out? I know how to do a regular standard deviation, mean, and mode with samples. I cannot figure this out for the life of me....... I just need someone to tell me how to get the calculations without having the samples?