While configuring Normalize data, you decide to apply the Zscore mathematical function from the Transformation method dropdown list to apply on the chosen columns. From the given options, choose the right formula that is used to convert all values to a z-score.

Answer options:

A.z = x - mean(x)/stdev(x)
B.z = x-min(x)/[max(x) - min(x)]
C.z = 1/1 + exp(-x)
D.z = Lognormal.CDF(x;;μ,σ

Correct Answer: A 
Zscore function converts all values for the chosen columns to Z-score. The formula used to transform the values in a column is as given below: 

Option A is correct. the given formula is the right formula for the Zscore function.
Option B is incorrect. The given formula is for the MinMax function.
Option C is incorrect. The given formula is for Logistic mathematical function.
Option D is incorrect. The given formula is for the LogNormal function.
Reference: 
To know more about Normalizing Data Module, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/machine-learning/algorithm-module-reference/normalize-data