Another column in this data file cars gives the rated combined fuel economy (in miles per gallon) for 509 vehicles sold in the United States (see prior question).
(a) Produce a histogram of these data. Describe and interpret the histogram.
(b) Compare the histogram to the boxplot. What does the histogram tell you that the boxplot does not, and vice versa?
(c) Find the mean and standard deviation of the rated mileages. How are these related to the histogram, if at all?
(d) Find the coefficient of variation and briefly interpret its value.
(e) Identify any unusual values (outliers). Do you think that these are coding errors?
(f) Government standards call for cars to get 27.5 MPG. What percentage of these vehicles meet this goal? (Are all of these vehicles cars?)