The statistical distribution
functions described below are all implemented in QlikView using the Cephesfunction
library. For references and details on algorithms used, accuracy, and so on,
see: http://www.netlib.org/cephes/.
The Cephes function library is used by permission.

The statistical distribution DIST functions measure the probability of the distribution function at the point in the distribution given by the supplied value. The INV functions calculate the value, given the probability of the distribution. In contrast, the groups of statistical aggregation functions calculate the aggregated values of series of statistical test values for various statistical hypothesis tests.

All functions can be used in both the load script and in chart expressions.

Use the drop-down on each function to see a brief description and the syntax of each function. Click the function name in the syntax description for further details.

CHIDIST() returns the one-tailed probability
of the chi^{2} distribution. The chi^{2} distribution is associated with a ch^{i2} test.

NORMDIST() returns the cumulative normal
distribution for the specified mean and standard deviation. If mean = 0
and standard_dev = 1, the function returns the standard normal distribution.

TDIST() returns the probability for the
Student's t-distribution where a numeric value is a calculated value of
t for which the probability is to be computed.