
Confidence Intervals for one Observed value 
For help go to SISATHIS PROCEDURE IS NOW MOBILE FRIENDLY 
Give at least a mean. A positive decimal numbers larger than zero. 
Mean:  
Number of cases:  * 
Standard deviation:  * 
Width of C.I.:  % 
* Optional input, not required. 





One mean.
This procedure constructs confidence
intervals around a single mean, be it a
binomial proportion, a poisson count or
a normally distributed mean or average.
The alpha or error one level can be set
to any value you want. Including exact
and approximate estimates.
