TY  - RPRT
TI  - Statistics made simple. Part 2. Standard deviation, variance and range.
AU  - Alison Twycross
AU  - Linda Shields
PY  - 2004
DO  - 10.7748/paed2004.06.16.5.24.c922
UR  - https://pubmed.ncbi.nlm.nih.gov/15214102/
ID  - 15214102
ER  -