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Statistical Power
For help go to SISA

Give at least two means.

Mean 1 (Exp.):
Mean 2 (Obs.):
SD1 or Tolerance:
N1 of cases:
Allocation Ratio:
Alpha: %


Two sample
One Sample

Power procedure
to calculate the probability of finding
a pre-specified difference (delta) given
a certain alpha (error 1) level and sample
size. Works for comparing two independent
samples, one sample against a fixed value or
parameter and for correlated or paired
samples. It is also possible to calculate
the power size in an equality analysis.
Useful for the analysis of randomized
> trials (RCT).