Dear friends - I hope you will accept a naive question on lm: R version
3.4.1, Windows 10
I have 204 "baskets" of three types corresponding to factor F, each of
size from 2 to 33 containing measurements, and need to know if the
standard deviation on the measurements in each basket,sdd, is different
across types, F. Plotting the observed sdd versus the sizes from 2 to
33, called "k" , does show a decreasing spread as k increases towards 33.
I tried lm(sdd ~ F,weight=k) and got different results if omitting the
weight argument but would it be the correct way to use sqrt(k) as weight
instead?
Best wishes
Troels Ring
Aalborg, Denmark
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