You want to compare bond funds based on risk. For each of these three levels of risk (below average, average, above average), use the variables expense ratio, return 2009, three-year return, and five-year return and complete the following.
a. Compute the mean, median, first quartile, and third quartile.
b. Compute the range, interquartile range, variance, standard deviation, and coefficient of variation.
c. Construct a boxplot. Are the data skewed? If so, how?
d. Based on the results of (a) through (c), what conclusions can you reach about differences between bond funds based on risk?