Mathematics · Ch 8 — Measures of Dispersion
Measures of Dispersion
8.1
Measures of Dispersion
Measures of Dispersion
The measures of dispersion commonly used to quantify how much a data set's observations scatter around their mean are: (i) Range, (ii) Variance, and (iii) Standard deviation. Each is …
Table Table-1Runs scored by three batsmen (motivating example)
| Batsman | Runs scored | Total | Mean |
|---|---|---|---|
| X | 90, 17, 104, 33, 6 | 250 | 50 |
| Y | 40, 60, 55, 50, 45 | 250 | 50 |
Misc ActivityComparing the scatter of two series
Worked out. Gives two series, A: 0.5, 1, 1.5, 3, 4, 8 and B: 2, 2.2, 2.6, 3.4, 3.8, and asks students to find the arithmetic mean of each series, plot both on a number line, and observe visually which series is more scattered. …