TY  - GEN
AU  - Altman,D G
AU  - Bland,J M
TI  - Statistics notes. Units of analysis
SN  - 0959-8138
PY  - 1997///0731
KW  - Sampling Studies
KW  - Statistics as Topic
N1  - Publication Type: Journal Article; Review
UR  - https://doi.org/10.1136/bmj.314.7098.1874
ER  -