Z-Score Normalization (Data Mining)

Z-Score Normalization – (Data Mining)

Z-Score helps in normalization of data.

How to calculate Z-Score of the following data?

marks

8
10
15
20  
z score normalization standard deviation
Figure: z score normalization standard deviation

Mean = 13.25

Standard deviation = 5.37

z score normaliation data mining
Figure: z score normalization data mining

marks

marks after z-score normalization

8 -1.14
10 -0.7
15 0.3
20 1.4