(15 points) The \"fuel\" efficiency in an electric car is not measured in miles/

Question

(15 points) The "fuel" efficiency in an electric car is not measured in miles/gallon, but rather in Watt-hours/mile (Wh/mile). Calculate the average and standard deviation of the following set of fuel efficiencies for a car. All values have the units Wh/mile. The various efficiencies represent the driving technique. 256, 333, 375, 324, 294, 288, 301, 311, 312, 250, 222 (5 points) If the driver of a car with a 75 KWh battery adjusts his/her technique to the average of the above values, how far can the car go? 279 Wh/mile, 190 200 miles 297 Wh/mile, 0.29 0.30 miles 290 Wh/mile, 290- 300 kilometers 297 Wh/mile, 250 260 miles

Explanation / Answer

(a) The mean of the data is 296.9 = 297 Wh/mile and standard deviation is 42.6 Wh/mile.

(b) For a 75 KWh battery = 75 * 1000 Wh, running at an average of 297 Wh/mile, the distane it can cover is

75*1000/297 = 252 miles

Therefore the 4th Option is the correct answer 297 Wh/mile, 250-260 miles

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