Statistics 简明教程
Statistics - Variance
方差定义为与均值的平方差的平均值。
A variance is defined as the average of Squared differences from mean value.
组合被以下函数定义和给出:
Combination is defined and given by the following function:
Formula
其中——
Where −
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${M}$ = Mean of items.
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${n}$ = the number of items considered.
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${n_i}$ = items.
Example
Problem Statement:
Problem Statement:
求解以下数据的方差:{600, 470, 170, 430, 300}
Find the variance between following data : {600, 470, 170, 430, 300}
Solution:
Solution:
步骤 1:确定给定项目均值。
Step 1: Determine the Mean of the given items.
步骤 2:确定方差
Step 2: Determine Variance
因此,方差为 ${21,704}$ 。
As a result, Variance is ${21,704}$.