Waec Model Questions Vol1 2018 Agricultural Science Question 49
Practice objective / multiple choice question 49 from the 2018 Waec Model Questions Vol1 Agricultural Science examination.
In a field survey of 100 plants, disease severity was rated on a scale of 0 (no symptoms) to 5 (severe symptoms). The numbers of plants in each rating category are: 0 - 10 plants, 1 - 15 plants, 2 - 20 plants, 3 - 30 plants, 4 - 15 plants, 5 - 10 plants. Using the disease index formula DI = (Σ (rating × number of plants) / (maximum rating × total plants)) × 100, calculate the disease index for the field.
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This is Waec Model Questions Vol1 2018 Agricultural Science Question 49. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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