standard deviation over columns

Hi

I am struggling with a seemingly simple problem, but I can't solve it... 

I want to calculate the standard deviation of five columns as a new variable. Just like I can calculate the average of these columns. The stdev function only takes a vertical look, not the horizontal...

What should I do?

Any suggestions?

 

Thanks & Kind regards

Egbert

 

 

 

(1) Answer

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