6. The eight best-selling paperback business books are listed in Table 2.4 (BusinessWeek, April 3, 2000). Suppose a sample of book purchases provided the following data: 7 Habits Dad 7 Habits Millionaire Millionaire WSJ Guide Motley Millionaire Tax Guide 7 Habits Dad Dummies Millionaire Motley Dad Dad Parachute Dad Dad 7 Habits WSJ Guide WSJ Guide WSJ Guide 7 Habits Motley WSJ Guide Millionaire 7 Habits Millionaire Millionaire Millionaire 7 Habits Millionaire 7 Habits Motley Motley Motley 7 Habits Dad Dad Dad Dad 7 Habits WSJ Guide Tax Guide Millionaire Motley Tax Guide Motley Motley Millionaire Millionaire Dad Dummies Millionaire Millionaire Millionaire Dad Millionaire Dad

a. Construct frequency and percent frequency distributions for the data. Group any books with a frequency of 5% or less in an “other” category.

b. Rank the best-selling books.

c. What percentage of the sales are represented by The Millionaire Next Door and Rich Dad, Poor Dad?