Read about reporters who blew it when trying to write about stats. A mathematician leads you through the tricks, citing contemporary examples. I'm confused on two issues.
None come out the same.
Standard deviation and RMS are generally close, but in some cases are off by a factor of 2 or more. In chronological order. Other statistics could have more complicated standard errors. For example, the sample standard deviation s from a normal distribution has a standard error which involves gamma functions. All rights reserved.