Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations.

The Wellspring Company's fleet of trucks get 19, 10, 20, 9, 15, 10, and 23 miles per gallon. What is the mean miles per gallon for the fleet? Round to the nearest whole number.
A. 17 miles per gallon
B. 15 miles per gallon
C. 16 miles per gallon
D. 13 miles per gallon

Step 1 ：Given the miles per gallon for each truck in the Wellspring Company's fleet: 19, 10, 20, 9, 15, 10, and 23.

Step 2 ：To find the mean miles per gallon for the fleet, we need to add all the miles per gallon together and then divide by the total number of trucks.

Step 3 ：First, add all the miles per gallon together: \(19 + 10 + 20 + 9 + 15 + 10 + 23 = 106\)

Step 4 ：Then, divide the total miles per gallon by the number of trucks: \(\frac{106}{7} = 15.14\)

Step 5 ：Round the result to the nearest whole number to get the mean miles per gallon for the fleet.

Step 6 ：Final Answer: The mean miles per gallon for the fleet is \(\boxed{15}\) miles per gallon.