A farmer plants ginger as a main crop in his farm all year long because ginger can be harvested multiple times throughout its growth stages. The farmer studied the effects of proportion of watering...

Extracted text: A farmer plants ginger as a main crop in his farm all year long because ginger can be harvested multiple times throughout its growth stages. The farmer studied the effects of proportion of watering (ml) per day and different growth stages on the crop yield (kg) in his farm. The below table records the ginger crop yielded (kg) for different growth stages and different proportions of watering. Each watering setting has four rows of crops to rule out other factors. Proportion of watering (ml) Growth Stage 50 65 80 130, 155 34, 40 20, 70 1 74, 180 80, 75 82, 58 150, 188 136, 122 25, 70 2 159, 126 106, 115 58, 45 138, 110 174, 120 96, 104 3 168,170 150, 139 82, 60


Extracted text: (a) State an appropriate model. By using ANOVA, test for (i) equality in cell means. (ii) the significance of interaction effects between proportion of watering and growth stage. (iii) the significance of growth stage effects. Use a = 0.05. (b)