Aritmeetiline keskmine
Antud arvude aritmeetiliseks keskmiseks nimetatakse arvu, mis saadakse arvude summa jagamisel liidetavate arvuga.
Näiteks:
Leiame arvude 2, 3, 4, 7, and 9 aritmeetilise keskmise.
(2+3+4+7+9 = 25) : 5 = 5
Aritmeetiline keskmine on 5.
Comparison of common averages of values { 1, 2, 2, 3, 4, 7, 9 } (https://en.wikipedia.org/wiki/Average)
|
Type |
Description |
Example | Result |
| Arithmetic mean | Sum of values of a data set divided by number of values: | (1+2+2+3+4+7+9) / 7 | 4 |
| Median | Middle value separating the greater and lesser halves of a data set | 1, 2, 2, 3, 4, 7, 9 | 3 |
| Mode | Most frequent value in a data set | 1, 2, 2, 3, 4, 7, 9 | 2 |
| Mid-range | The arithmetic mean of the highest and lowest values of a set | (1 + 9)/2 | 5 |
