The accompanying box-and-whisker plot represents the number of gallons of water used by 80 households over a 1-day period. Determine the approximate values for the median, the first and third quartiles, and the range. Does the distribution appear to be skewed? If so, is it positively skewed or negatively skewed?
A computer and statistical software will be desirable and useful. However, any necessary calculations can also be done with the aid of a pocket calculator. For readers using statistical software, keep in mind the file-naming key— for example, the data for Exercise 3.57 will be in data file XR03057.
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