Use the data for daily energy usage of a small town during ten days in June. Find the mean and the standard deviation of the data. How many values in the data set fall within one standard deviation from the mean? Within two standard deviationsWithin three standard deviations? 51.8 MWh 53.6 MWh 54.7 MWh 51.9 MWh=49.3 MWh 52.0 MWh 51.2 MWh 60.7MWh 59.3MWh

a. How is the mean of the data set used in the formula for standard deviation?