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I've got an balanced incomplete block design, and I want to work out the efficiency of this design. In order to work out the efficiency I implied the following equations:

r=b*k / t

lambda = r(k-1)/ t-1

e= t*lambda / r*k

I got into a cliche of which to use to work out what to use for block (b), the cliche are:

compared three of eight different varieties of beer (i.e. 8 choose 3)

1) is block 8*3

2) is block 8chose 3, if so how can I work it out? hence I don't have a graphic calculator

thanks!

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# Balanced incomplete block design

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