In an example in Chapter 3, we developed the following cross-tabulation of sales transaction data: Region Book
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In an example in Chapter 3, we developed the following cross-tabulation of sales transaction data:
Region Book DVD Total East 56 42 98 North 43 42 85 South 62 37 99 West 100 90 190 Total 261 211 472
a. Find the marginal probabilities that a sale originated in each of the four regions and the marginal probability of each type of sale (book or DVD).
b. Find the conditional probabilities of selling a book given that the customer resides in each region.
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