The standard deviation measures variation about the mean. Two standard
deviations is just twice the standard deviation:

=2*STDEV(A1:A10)



--
Gary''s Student - gsnu200752


"Eric" wrote:

Does anyone have any suggestions on how to find the second standard deviation?
For the first S.D., which is STDEV(a1:a20).
Does anyone have any suggestions?
Thanks in advance for any suggestions?
Eric