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Chapter 1: Q. 54. (page 48)

Fuel efficiency Refer to Exercise 48. Describe the distribution.

Short Answer

Expert verified

Left skewed

Single peak

Gap between -2 mpg and 6 mpg

Step by step solution

01

Step 1. Given information. 

The dotplot shows the difference (Highway − City) in EPA mileage ratings, in miles per gallon

02

 Step 2. The shape of the distribution.  

We can see that the distribution is skewed to the left because the peak in the dotplot is to the right, with a tail of fewer dots to the left.

We notice that the distribution has a single peak at 9 mpg, with a gap between -2 mpg and 6 mpg. -3 mpg is thus a possible outlier.

Left skewed

Single peak

Gap between -2 mpg and 6 mpg

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