Waec Model Questions Vol1 2025 Agricultural Science Question 8
Practice objective / multiple choice question 8 from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
During a disease survey of 120 plants, a 0-5 rating scale is used (0 = healthy, 5 = dead). The observed frequencies are: rating 0 - 30 plants, rating 1 - 40 plants, rating 2 - 20 plants, rating 3 - 15 plants, rating 4 - 10 plants, rating 5 - 5 plants. Calculate the Disease Severity Index (DSI) using the formula DSI = (Σ (rating × number of plants)) ÷ (5 × total plants) × 100. Express your answer to one decimal place.
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This is Waec Model Questions Vol1 2025 Agricultural Science Question 8. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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