STAT (31) - statistics PDF

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A sample of light trucks using diesel fuel revealed the following distribution based on fuel efficiency, i.e., miles per gallon (mpg).

mpg 10 up to 13 13 up to 16 16 up to 19 19 up to 22 22 up to 25 25 up to 28

Number of Trucks 2 5 10 8 3 2

What is the arithmetic mean miles per gallon? A) 16.9 B) 18.6 C) 17.0 D) 17.9 E) None of the above Answer: B Which measure of central location is used to determine an average annual percent increase? A) Arithmetic mean B) Weighted mean C) Mode D) Geometric mean E) Median Answer: D Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet?"

What is the class with the greatest frequency?

A. Very concerned B. Somewhat concerned C. No concern D. None Apply

The very concerned class has 140 people....