Group mpg Regular gasoline Mean Std. Deviation 21 2.73 New formula gasoline 22.75 3.25 F Sig t df Sig. (2-tailed) mpg Equal variances .034 .855 -1.429 22 .167 assumed Equal variances -1.429 21.362 .168 not assumed Which type of gasoline has lower average miles per gallon? Regular gasoline New formula gasoline Both types of gasoline give the same average miles per gallon
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