Question: The cost of consumer purchases such as single-family housing, gasoline. Internet services, tax preparation. and hospitalization were provided in The Wall-Street Journal (January 2. 2007). Sample data typical of the cost of tax-return preparation by services such as H&R Block are shown below.
a. Compute the mean, median, and mode.
b. Compute the first and third quartiles.
c. Compute and interpret the 90th percentile.