PPT Slide
Estimated Standard Deviations (ESD) vs Standard Deviations
- An ESD is the estimated uncertainty derived from a “single measurement”.
- A Standard Deviation is an uncertainty obtained from collecting “multiple measurements”.
- Rietveld programs ESDs are fine as ESDs go, but they can under estimate “probable error”.
- If you want to know what the “Standard Deviation” is, multiple sample preparation, packing and collection of the data a statistically valid number of times is a way to proceed.