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The standard deviation of fuel consumption of a manufacturer's sport utility vehicle is hypothesized to be 13.3 miles per gallon. A random sample of 18

  1. The standard deviation of fuel consumption of a manufacturer's sport utility vehicle is hypothesized to be 13.3 miles per gallon. A random sample of 18 vehicles has a standard deviation of 2.8 miles per gallon. State the parameter of interest.

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