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The following two-way contingency table gives the breakdown of the population of...
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The following two-way contingency table gives the breakdown of the population of patrons at a grocery store according to the number of items purchased and whether or not the patron made an impulse purchase at the checkout counter. F and M are:
| Impulse purchase | ||
| # of items | Made (M) | Not made (M') |
| Few (F) | 0.05 | 0.20 |
| Many (F') | 0.15 | 0.60 |
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