Question

What is the process of subtracting the mean of each variable from its variable called ?

Answer 1

• The process of subtracting the mean value from the variable is called as ‘Centering’ the variable.
• In Regression analysis, a mean centered variable is a variable which has mean equal to zero.
• Another similar concept is ‘Standardization’ in which the mean is subtracted from variable and then divided by standard deviation.
• A standardized variable is the one which has standard deviation as one and mean as zero

Answer 2

Answer:

Mean Normalization

Step-by-step explanation:

x'=x-mean(x)

____________

max(x)-min(x)

This distribution will have values between -1 and 1with μ=0.

Standardisation and Mean Normalization can be used for algorithms that assumes zero centric data like Principal Component Analysis(PCA).