Gce Model Questions Vol1 2024 Agricultural Science Question 4

Practice objective / multiple choice question 4 from the 2024 Gce Model Questions Vol1 Agricultural Science examination.

Gce Model Questions Vol1 2024 Agricultural Science Objective / Multiple Choice Medium Difficulty
Question 4 GCE_MODEL_QUESTIONS_VOL1 • 2024 • AGRICULTURAL_SCIENCE • objective

A field study compared two farms over six months. Farm A, which used a vaccination programme, recorded \(12\) cases of bacterial pneumonia among \(200\) cattle. Farm B, which did not vaccinate, recorded \(30\) cases among \(180\) cattle. Calculate the relative risk of disease for unvaccinated cattle compared with vaccinated cattle, and state what the value indicates about the effectiveness of the vaccine.

Answer Options

Correct Answer A. Relative risk ≈ 2.8; unvaccinated cattle are about 2.8 times more likely to get the disease, indicating the vaccine is effective.
B. Relative risk ≈ 0.8; unvaccinated cattle are slightly less likely to get the disease, which would incorrectly imply the vaccine is harmful.
C. Relative risk ≈ 3.5; unvaccinated cattle are about 3.5 times more likely to get the disease, overstating the vaccine's effectiveness.
D. Relative risk ≈ 1.5; unvaccinated cattle are about 1.5 times more likely to get the disease, suggesting a modest vaccine benefit.
Correct Answer
A
Correct Option:
Relative risk ≈ 2.8; unvaccinated cattle are about 2.8 times more likely to get the disease, indicating the vaccine is effective.

About This Question

This is Gce Model Questions Vol1 2024 Agricultural Science Question 4. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Agricultural Science examination.

Difficulty level: Medium .

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