Special Topics 504: Practical Methods in Analyzing Animal Science Experiments
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Special Topics 504: Practical Methods in Analyzing Animal Science Experiments. Factorial Designs Five different levels of probiotic treatments are tested on male and female trout in a 4 week feeding trial. H o : μ 2 1 = μ 2 2 = μ 2 3 = μ 2 4 = μ 2 5

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Special Topics 504: Practical Methods in Analyzing Animal Science Experiments

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Special Topics 504: Practical Methods in Analyzing Animal Science Experiments

Factorial Designs

Five different levels of probiotic treatments are tested on male and female trout in a 4 week feeding trial.

Ho: μ21 = μ22 = μ23 = μ24 = μ25

Ha: Specific Growth Rates are not the same in all five diets.

SexTrt1Trt2Trt3Trt4Trt5

Male28.239.646.341.056.3

Male33.240.842.144.154.1

Female36.437.943.546.459.4

Male34.637.148.840.262.7

Female29.143.643.738.660.0

Female31.042.440.136.357.3


Special Topics 504: Practical Methods in Analyzing Animal Science Experiments

Latin Square

Latin square designs (they are essentially Cayley tables) are used often in pond culture. A typical Latin square is a table of n x n filled with different treatments in such a way that each treatment occurs in only once in each row or column.

1

2

3

Entries are written as

(r, c, t)

2

3

1

3

1

2


Special Topics 504: Practical Methods in Analyzing Animal Science Experiments

Latin Square

Latin squares are most often used in cross-over designs which are economical and used to examine both a test group and control group with the groups reversed after a period of time.

T0 – T1 T1 – T2

Treated

Control

Control

Treated


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