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Analysis of Data from Designed Experiments |
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Completely Randomised Design |
Example: {Nigam, A.K. and Gupta V.K., 1979, Handbook on Analysis of Agricultural experiments, First Edition, I.A.S.R.I. Publication, New Delhi, pp16-20}.A feeding trial with 3 feeds namely (i) Pasture(control), (ii) Pasture and Concentrates and (iii) Pasture, Concentrates and Minerals was conducted at the Yellachihalli Sheep Farm, Mysore, to study their effect on wool yield of Sheep. For this purpose twenty-five ewe lambs were allotted at random to each of the three treatments and the three treatments and the weight records of the total wool yield (in gms) of first two clipping were obtained. The data for two lambs for feed 1, three for feed 2 and one for feed 3 are missing. The details of the experiment are given below:
Yield (in gms)
|
FEED 1 |
FEED 2 |
FEED 3 |
|
850.50 |
510.30 |
992.25 |
|
453.60 |
963.90 |
850.50 |
|
878.85 |
652.05 |
1474.20 |
|
623.70 |
1020.60 |
510.30 |
|
510.30 |
878.85 |
850.50 |
|
765.45 |
567.00 |
793.80 |
|
680.40 |
680.40 |
453.60 |
|
595.35 |
538.65 |
935.55 |
|
538.65 |
567.00 |
1190.70 |
|
850.50 |
510.30 |
481.95 |
|
850.50 |
425.25 |
623.70 |
|
793.80 |
567.00 |
878.85 |
|
1020.60 |
623.70 |
1077.30 |
|
708.75 |
538.65 |
850.50 |
|
652.05 |
737.10 |
680.40 |
|
623.70 |
453.60 |
737.10 |
|
396.90 |
481.95 |
737.10 |
|
822.15 |
368.55 |
708.75 |
|
680.40 |
567.00 |
708.75 |
|
652.05 |
595.35 |
652.05 |
|
538.65 |
567.00 |
567.00 |
|
850.50 |
595.35 |
453.60 |
|
680.40 |
. |
652.05 |
|
. |
. |
567.00 |
|
. |
. |
. |
Where Feed 1- Pasture (control),
Feed
2- Pasture and Concentrates and
Feed
3- Pasture, Concentrates and Minerals.
1. Perform the analysis of variance of
the data to test whether there is any difference between
treatment effects.
2. Perform all possible pair wise
treatment comparisons and identify the best treatment i.e.
the treatment giving highest yield.
Analysis Using SAS Analysis Using SPSS
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