Determine the sample mean, median, mode (if it exists), range, sample variance and standard deviation, coefficient of variation, Pearson's second coefficient of skewness, and coefficient of kurtosis of the given data set. Describe the skewness and kurtosis of the given data set.

3.28 . U.S. Census data for San Luis Obispo County, California, were used to construct the following frequency distribution for commute time (in min- utes) of working adults (the given frequencies were read from a graph that appeared in the San Luis Obispo Tribune [September 1, 2002] and so are only approximate): Commute Time Frequency 0 to