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Frequency histogram!

It is similar to a Bar Chart, but a histogram groups numbers into ranges And you decide what ranges to use!

Bar Graph VS Histogram

PRE HISTORY

1662: Concept exists at least since then in mortality tables of J. Graunt

1786: Bar charts introduced by W. Playfair to capture Scottish imports/exports

1833: Histograms introduced by A. M. Guerry as discrete approximations to distribution functions

1859: Florence Nightingale used them to compare mortality of soldiers and civilians

HISTOGRAM DEFINED

HISTOGRAMS

are a great way to show

results of continuous

DATA

Word `histogram’ of Greek origin

`histo-s’ = `mast’ (arrangement of spars, erected more or less vertically on the centre-line of a ship or boat.)

`gram-ma’ = `something written’

Introduced by Karl Pearson in 1892 for a “common form of graphical representation”

Numerical

Continous Data

(measured)

Descriptive

Discrete Data

(counted)

HISTOGRAM

by: pechot luna

Reference:

Yahnnis Ioannidis -University of Athens, Hellas

https://www.mathsisfun.com

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