User:GFauxPas/Sandbox

Welcome to my sandbox, you are free to play here as long as you don't track sand onto the main wiki. --GFauxPas 09:28, 7 November 2011 (CST)

Definition
Let $D$ be a finite collection of $n$ data regarding some quantitative variable.

Integer Data
Let the data in $D$ be described by natural numbers or by integers.

Let $x_0$ be the value of the smallest datum in $D$

Let $x_n$ be the largest datum in $D$.

A class is a subdivision of the integer interval $\left[{a \,.\,.\, b}\right]$, where $a \le x_0 \le x_n \le b$, iff:


 * Every datum is placed into exactly one subdivision


 * Every subdivision is disjoint from every other


 * The union of all classes contains the entire integer interval $\left[{x_0 \,.\,.\, x_n}\right]$

By convention, the first and last classes are not empty classes.

Def'ns
(Empty class)

(Normal class)

Class width

Class mark

Class limit

Class boundary

--GFauxPas (talk) 17:25, 27 September 2012 (UTC)