2.45 Construct a cross-tabulation table using cola preference (Rola or Koka) as the row variable and Rola-Cola purchase history (Yes or No) as the column variable. Based on the table, answer the following.
a How many shoppers who preferred Rola-Cola in the blind taste test had previously purchased Rola-Cola? 19
b How many shoppers who preferred Koka-Cola in the blind taste test had not previously purchased Rola-Cola? 21
c What kind of relationship, if any, seems to exist between cola preference and Rola-Cola purchase history?
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