The effect of four types of diets on the cows' milk production is being investigated. The researcher suspected that the milk productions are different for the four types of diets given to the cows. Four cows are used in this study and they received different diets on each lactation period. The following data are obtained: } What is the most appropriate design for the problem above and briey explain with justications why this design is chosen? (3 Marts) } Compute the estimated mean of the rst type of diet and interpret the results. (3 Merits) } Test whether the milk productions are different for the four types of diets. (9 Merits) 1 Based on this data. justify which type of diet should he recommended to be given to the cows. (6 Marita) 1 Test 1Whether the lactation period has an effect on the milk productions. (3 Marita)