The U.S. government's Cash for Clunkers program encouraged individuals to trade in their old gas-guzzlers for new,

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The U.S. government's "Cash for Clunkers" program encouraged individuals to trade in their old gas-guzzlers for new, more efficient vehicles. At α = .05, do the data below sup- port the hypothesis that the gain in mpg was more than 5 mpg? The null hypothesis is H0 : µd ‰¤ 5 mpg.
The U.S. government's
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