Fuel efficiencies of the two types of lorry it operates

Reference no: EM131111069

A transport company wants to compare the fuel efficiencies of the two types of lorry it operates. It obtains data from samples of the two types of lorry, with the following results:

Type	Average mpg	Std devn	Sample Size
A	31.0	7.6	33
B	32.2	5.8	40

Test the hypothesis that there is no difference in fuel efficiency, using the 99% confidence level.

Reference no: EM131111069

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