Range

The range is the difference between the highest and lowest value of a set of data. In a certain way, we may consider as the same concept as the domain of a continuous function.

Example

The Human Development Index (HDI) measures the developedment ofa country regarding several parameters. The following table shows the ranking of HDI of the countries of the European Union:

Country	Ranking HDI
Germany	$23$
Austria	$15$
Belgium	$17$
Bulgaria	$53$
Cyprus	$28$
Denmark	$14$
Slovakia	$42$
Slovenia	$27$
Spain	$13$
Estonia	$44$
Finland	$11$
France	$10$
Greece	$24$
Hungary	$36$
Ireland	$5$
Italy	$20$
Latvia	$43$
Lithuania	$45$
Luxembourg	$18$
Malta	$34$
Netherlands	$9$
Poland	$37$
Portugal	$29$
The United Kingdom	$16$
Czech Republic	$32$
Romania	$60$
Sweden	$6$

The country with the highest position in the ranking is Ireland (the fifth one), while the lowest is Romania in the position $60$ .

And so, the range of this scoring is:

$60 - 5 = 55$ positions.