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{"ops":[{"insert":"Question 1\n(a) What do you understand by the phrase Analysis of Variance (ANOVA) in biological assays? (2)\n(b) Three Animal Science students studied the effects of adding urea to bush on the milk production of cows. There are Holstein, Afrikaner and Nguni cows of the same parity and lactation phase for experimentation. There are three feed types (treatments) in total. Billy selected 1 Holstein, 1 Afrikaner and 1 Nguni cow and allocated a different treatment to each cow. Matthew selected 2 Nguni cows for Feed A, 2 Holstein cows for Feed B and 2 Afrikaner cow for Feed C. Beata selected 3 Nguni, 3 Afrikaner and 3 Holstein cows so that each Feed was allocated to 3 cows of different breeds.\ni) Identify the experimental principle that Billy violated. What is its importance in designing experiments and analysis of data?\nii) What mistake did Matthew make in his design? What was compromised by making such a mistake?\niii) Write a comment on Beata\u2019s experimental design?\n"}]}

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