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Determine the alternative hypothesis.

A researcher wanted to determine if using an octane booster would enhance gasoline mileage. A random sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks with the booster.

Miles / Gal Without	Miles / Gal With
21.2	23.8
25.4	25.6
20.9	22.4
27.6	28.3
22.8	24.5
27.3	28.8
23.4	25.2

Status the alternative hypothesis?
a.H1: μD _ 0
b.H1: μD < 0
c.H1: μD = 0
d.H1: μD _ 0

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M922089

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