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Confidence Intervals
for one Observed value

For help go to SISA.

Give at least a mean.
A positive decimal numbers larger than zero.


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.