A trivial question but it's bugged me for a while. My understanding of
terminology is that latin lower case letters tend to refer to statistics
while greek lower case tends to refer to population parameters. While I
appreciate statistical notation can be unconventional, I have often
wondered why there are statistics such as Spearman's rho and Cohen's kappa
which have greek letters.
Did the latin letters run out?
Is this a sign that Spearman and Cohen were free thinkers?
Is there something systematic going on here?
Is there a reason or a story behind this ... or do I simply need to get out
more?
Richard Atkins
Thames Valley University
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