4. The quality of wine obtained from a vineyard varies from year to year depending on...

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4. The quality of wine obtained from a vineyard varies from year to year depending on a combination of factors, some of which are predictable and some of which are not. From histor- ical data extending over the past 100 years, the year-to-year succession pattern was as follows: Previous Year Poor Fair Good Excellent Poor 2 6 9 3 Fair 6 12 20 Graded Year 21 Good 8 20 5 1 Excellent 4 2 0 0 4. The quality of wine obtained from a vineyard varies from year to year depending on a combination of factors, some of which are predictable and some of which are not. From histor- ical data extending over the past 100 years, the year-to-year succession pattern was as follows: Previous Year Poor Fair Good Excellent Poor 2 6 9 3 Fair 6 12 20 Graded Year 21 Good 8 20 5 1 Excellent 4 2 0 0