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Blocking is a technique (procedure) that is used in biological / agricultural field experiments to arrange experimental units in groups or blocks that are similar to one another. It is an attemp to improve comparisons of treatments.
Blocking will reduce the source of variability and increase precision (and may be accuracy)
The theoritical basis of blocking is represented b the following mathematical results. Given X and Y are random variables
VAR(X-Y)=VAR(X)+VAR (Y)-2 COV(X,Y)
Phendukani Hlatshwayo (M.Sc Agronomy, Candidate from South Africa)
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∙ 11y ago
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Difference between variable and constant in statistics?
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manipulated variable is in the Statistics, Mathematics, Analysis subject.manipulated variable is in the Statistics, Mathematics, Analysis subject.
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inferential statistics
In statistics is gender a quantitative variable?
No it is qualitative
Difference between variable and constant in statistics?
When referring to statistics, variable means that numbers change and can go up and down. If something is constant, numbers remain unchanged.
What is numeric x in statistics?
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What is a factor in statistics?
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