Sample size calculation

However, only a total of 30 goats are available for all the 3 groups. So what can we do? The analysis of the first two batches suggested that there was no difference between diets C and B in terms of average milk yield. In other words, fluctuating supplementation levels of calliandra appeared to have no negative effect on milk yield.

Analysis of variance (adjusted for covariate)
Source

d.f.

s.s.

m.s.

v.r.

F pr.

Batch stratum
Covariate

1

32310

32310

   
Batch.*Units* stratum
Diet60

2

4313

2157

1.30

0.305

Covariate

1

85893

85893

51.95

<.001

Residual

13

21492

1653

4.64

 
Total

17

154607

     
Grand mean

198.0

       
Diet60

C

A+B

B

   
 

188.4

219.9

185.7

   
rep.

6

       
d.f.

13

       
s.e.d.

23.92

       

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