how to multiply 29,5 with sqrt of 12

[Smiley]

I have a row of percenteges (12) where I have to get the Standarddeviation
from,that number has to be multiplied with the root of 12

 

[Tourcat]

Here is a formula that might help.

=STDEV(A4:L4)*SQRT(12)

 

[Peo Sjoblom]

One way

=12^(1/2)*29.5

or

=STDEV(A1:A20)*12^(1/2)