Statistics 简明教程

Statistics - Arithmetic Range

一组数据的 Arithmetic Range 是集合中最高值和最低值之间的差。

The Arithmetic Range of a set of data is the difference between the highest and lowest values in the set.

算术范围由以下函数定义和给出 −

Arithmetic Range is defined and given by the following function −

Formula

其中——

Where −

  1. ${L}$ = Largest item

  2. ${S}$ = Smallest item

这是一个绝对测量值。称为范围系数的相对测量值由下式给出：

This is an absolute measure. The relative measure called as coefficient of range is given by

Example

Problem Statement −

Problem Statement −

切丽尔在一个评分周期中参加了 7 次数学考试。她的考试分数范围和范围系数是多少？

Cheryl took 7 math tests in one marking period. What is the range of her test scores and coeff.of range?

89

73

84

91

87

77

94

Solution −

Solution −

我们将考试分数从低到高排序，得到 -

Ordering the test scores from least to greatest, we get −

73

77

84

87

89

91

94

这些考试分数的范围是 21 分，范围系数是 0.1257 分。

The Range of these test scores is 21 points and coeff. of range is 0.1257 points.

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