RaqForum 43 No.
228 View  • 
     ...

Z-score

 

Possible outliers:|z|>2

Highly suspicious outliers:|z|>3

..

Detect outliers for the "Fare" by using Z-score

A

1

=file("D://titanic.csv").import@qtc()

2

=A1.avg(Fare)

3

=sqrt(var@s(A1.(Fare)))

4

=A1.derive((Fare-A2)/A3:Fare_z)

5

=A4.select(Fare_z>3 || Fare_z<-3)


A2 Calculate the mean of Fare

A3 Calculate the standard deviation of Fare

A4 Calculate the Z-score of Fare

A5 Select the samples which |z|>3


 
 •  228 View  •