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According to the U.S. Environmental Protection Agency, a sample of 10 subcompact models shows the following...

  1. According to the U.S. Environmental Protection Agency, a sample of 10 subcompact models shows the following estimated values for highway fuel economy (mpg): 40, 33, 32, 30, 27, 29, 27, 23, 21, and 10. The ∑x = 272 and the ∑x2 = 7982. Based on this sample, at least 88.9% of all subcompact model values for highway fuel economy (mpg) would fall within

    (19.147, 35.253).

    (10, 40).

    (37.644, 92.044).

    (11.094, 43.306).

    (3.041, 51.359).
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