Studied from its original page
Galton ogive
Galton's ogive · statistics by intercomparison
- Made by
- Francis Galton
- Year
- 1875
- Field
- Exploratory analysis and quality control
- Kind
- Data display
- Room
- How a group spreads
What it shows
Things ranked but never measured, each standing at its rank, with only the quarter, middle and three-quarter heights drawn.
How it is read
Read the three marked heights: the middle one is the typical value, and the gaps on either side show the spread.
See the original page — Fig. 1, printed p. 36 (PDF page 4)
Published 1875 (A) and Galton died in 1911, so life+70 ended in 1981 (B).
The data it needs
groupidentity · categoricalcountbase length · count · objectspvalue at grade 25 · quantitative · of the measured qualitymvalue at grade 50 · quantitative · of the measured qualityqvalue at grade 75 · quantitative · of the measured quality
Built in 5 steps, as its maker described
Fig. 1, printed p. 36; the ogive defined pp. 35-36; the sorting procedure pp. 36-37
17 other forms share this skeleton
Source
Galton 1875, Statistics by intercomparison, Philosophical Magazine 49
Attribution less certain: contested, or no single inventor recorded