Normal Distribution Calculator
The Normal Distribution Calculator makes it easy to compute cumulative
probability, given a normal random variable; and vice versa. For help in using
the calculator, read the Frequently-Asked Questions
or review the Sample Problems.
To learn more about the normal distribution, go to Stat Trek's
tutorial on the normal distribution.
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Enter a value in three of the four text boxes.
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Leave the fourth text box blank.
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Click the Calculate button to compute a value for the blank
text box.
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Note: The normal distribution table, found in the appendix of
most statistics texts, is based on the
standard normal distribution, which has a
mean of 0 and a standard deviation of 1. To produce outputs
from a standard normal distribution with this calculator,
set the mean equal to 0 and the standard deviation equal to 1.
Frequently-Asked Questions
Instructions: To find the answer to a frequently-asked
question, simply click on the question. If you don't see the answer you need,
try the Statistics Glossary or
check out Stat Trek's tutorial on the normal
distribution.