Fuel Economy. Refer to Table 7 on page 123 to answer Exercises 63–65. The data represent a sample.

Question 3.178

65. Find the following measures of spread for the fuel economy:

  1. Range
  2. Variance
  3. Standard deviation

3.2.65

(a) 30 mpg (b) 116 mpg2 (c) 10.770 mpg