Question: To estimate the difference between the average kilometres per litre of two different models of car, samples are taken and the following information is

To estimate the difference between the average kilometres per litre of two

To estimate the difference between the average kilometres per litre of two different models of car, samples are taken and the following information is collected. (10p+5p) Sample size Sample mean Sample variance Model A Model B 60 55 18 15 16 9 Table 4: Data for question 12 a. At 95% confidence compute an interval estimate for the difference between the av- erage kilometers per litre (kpl) for the two models. b. Give a verbal interpretation of your results.

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