Sample size calculation

Let us now return to the different options proposed earlier.

Option 3. Continue the experiment but exclude diet A+D altogether and assign the 12 goats equally to diets C and B. This option allows 12 goats to be compared on diets C and B.

Comment: The analysis of data collected in the first two batches indicates that there is little difference in milk yields between goats fed diet B or C. So, again how much improvement would this be on Option 1?

 


Option

Groups

  
 

C

A + D

B

A + B

1

9 (1,2,3)*

6 (3)

9 (1,2,3)

0

2

10 (1,2,3,4)

10 (3,4)

10 (1,2,3,4)

0

3

12 (1,2,3)

0

12 (1,2,3)

0

4

10 (1,2,3)

0

10 (1,2,3)

10 (1,2,3)

* batch numbers in which goats occur

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