Complete the following for expense ratio in percentage, three-year return, and five-year return.
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 concerning these variables?