#### A small car dealership tests the fuel efficiency of sedans on its lot. It chooses 12 sedans for the test. The fuel efficiency (mpg) values of the cars are given in the table below. Complete the table as directed below

a. Calculate the mean fuel efficiency for these cars.

b. Calculate the deviations from the mean, and write your answers in the second row of the table.

c. Square the deviations from the mean, and write the squared deviations in the third row of the table.

d. Find the sum of the squared deviations

e. What is the value of n for this data set? Divide the sum of the squared deviations by n - 1