统计学 题目 （英文题目）

A major oil company wanted to estimate the difference in fuel consumption for cars using regular engine oil and cars using a synthetic oil product. A random sample of 10 motorist and their cars was selected. The following procedure was carried out for each of the 10 cars. The car was filled with petrol. The oil was drained and new oil was added. The car was driven 100km on a specified route. The amount of petrol used was determined and the fuel consumption in Litres /100km was calculated. The process was repeated using the other type of oil. The order in which the oils were used was decided randomly. The results are shown in the following table:

Table 1: Fuel Consumption (L/100km) for a Random Sample of Vehicles
Car 1 2 3 4 5 6 7 8 9 10
Synthetic Oil 14.3 9.8 13.9 15.1 12.1 10.4 10.0 13.2 10.7 14.2
Regular Oil 13.7 11.0 10.2 19.0 13.1 13.4 10.1 21.7 11.6 19.8
Can the oil company conclude that there is a difference in fuel consumption between the two type

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