z score Calculator
This calculator is from
http://www.fourmilab.ch/rpkp/experiments/analysis/zCalc.html, with thanks
going to John Walker.
Note that there is no closed form solution to come up with exact z-score
cumulative probability values. Therefore, the cumulative probability calculated from the z-score
is an approximation. The calculators below calculate to six decimal places of
accuracy, which is more than adequate for most purposes.
not, consider switching to a browser which implements it.
Calculate cumulative probability p from z
One of the most common probability calculations is determining, given
the measured z value from an experiment or set of
experiments, the cumulative probability. Enter
the z value in the box below, press the Return key or
the Calculate button, and the probability will appear in the Q
Calculate z from cumulative probability p
To determine the z score indicating a cumulative probability p,
enter p in the box below and
press the Return key or the Calculate button.