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The analysis of groups of experiments

Published online by Cambridge University Press:  27 March 2009

F. Yates  and
W. G. Cochran
F. Yates
Affiliation:
Statistical Department, Rothamsted Experimental Station, Harpenden
W. G. Cochran
Affiliation:
Statistical Department, Rothamsted Experimental Station, Harpenden
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Extract

When a set of experiments involving the same or similar treatments is carried out at a number of places, or in a number of years, the results usually require comprehensive examination and summary. In general, each set of results must be considered on its merits, and it is not possible to lay down rules of procedure that will be applicable in all cases, but there are certain preliminary steps in the analysis which can be dealt with in general terms. These are discussed in the present paper and illustrated by actual examples. It is pointed out that the ordinary analysis of variance procedure suitable for dealing with the results of a single experiment may require modification, owing to lack of equality in the errors of the different experiments, and owing to non-homogeneity of the components of the interaction of treatments with places and times.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 28 , Issue 4 , October 1938 , pp. 556 - 580
Copyright
Copyright © Cambridge University Press 1938

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References

REFERENCES

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