You used SS, = Σ(x-x) when calculating variance and standard deviation. An alternative formula for the standarddeviation that is sometimes convenient for hand calculations is shown below. You can find the sample variance bydividing the sum of squares by n-1, and the sample standard deviation by finding the square root of the samplevariance. Complete parts (a) and (b) below.(Ex)²SSxClick the icon for a table of the ages (in years) of shoppers at a local store.= Σχε(a) Use the shortcut formula to calculate the sample standard deviation.S=(Simplify your answer. Round to one decimal place as needed.) 4n exYou used SS = x (x-x)² when calculating variance and standard deviation. An alternative formula for the standarddeviation that is sometimes convenient for hand calculations is shown below. You can find the sample variance bydividing the sum of squares by n-1, and the sample standard deviation by finding the square root of the samplevariance. Complete parts (a) and (b) below.(Ex)²SS = Ex².Click the icon for a table of the ages (in years) of shoppers at a local store.Data table1916151820171916Shoppers' Ages202018182019242018181616nXar allCheck answer

The shortcut formula for calculating sample standard deviation is Std dev= √SSx/(n-1) SSx=…

You used SS₂ = Σ(x-x) when calculating variance and standard deviation. An alternative formula for the standard deviation that is sometimes convenient for hand calculations is shown below. You can find the sample variance by dividing the sum of squares by n-1, and the sample standard deviation by finding the square root of the sample variance. Complete parts (a) and (b) below. (Ex)² SSX = Ex² n Click the icon for a table of the ages (in years) of shoppers at a local store. (a) Use the shortcut formula to calculate the sample standard deviation. S= (Simplify your answer. Round to one decimal place as needed.)