Sunday, November 14, 2010

SE Notation

The symbol for a population standard deviation is the Greek letter σ (‘sigma’).
For a sample standard deviation the symbol is s.

The notation for a standard error is given on the right of this post.

We don’t change the symbol on the left. Just switch the sigma in the numerator on the right side to s if you happen to know that it is from a sample (for example you just calculated it from data that is a sample)

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