Use the population data set of the price, in dollars, of a milkshake at five different restaurants: 2, 4, 6, 9, 14.

The mean is 7.

Which of the following is the approximate standard deviation for the set?

The standard deviation of the set is 4.2

Step-by-step explanation:

The standard deviation (sd) for the set is calculated as follows:

sd² = [ (x1 - mean) ² + (x2 - mean) ² + ... ]/N

where x1, x2, et cetera are the values in the set and N is the number of elements in the set. Replacing with dа ta:

sd² = [ (2 - 7) ² + (4 - 7) ² + (6 - 7) ² + (9 - 7) ² + (14 - 7) ²]/5

sd = √17.6

sd = 4.2