EXAMPLE 2.25 Calculating a Marginal Distribution
CASE 2.2 Let’s find the marginal distribution for the types of wine sold. The counts that we need for these calculations are in the margin at the right of the table:
| Wine | Total |
|---|---|
| French | 99 |
| Italian | 31 |
| Other | 113 |
| Total | 243 |
106
The percent of bottles of French wine sold is
Similar calculations for Italian wine and other wine give the following distribution in percents:
| Wine | French | Italian | Other |
| Percent | 40.74 | 12.76 | 46.50 |
The total should be 100% because each bottle of wine sold is classified into exactly one of these three categories. In this case, the total is exactly 100%. Small deviations from 100% can occur due to roundoff error.