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7-11-1
Distributions
7-11 Distributions
Though there are a number of different types of distributions, the one most commonly used is
the “Normal Distribution”, which is an essential type of distribution for statistical calculations.
Other types of distributions include the Poisson distribution and geometric distribution. The
type of distribution used depends on the type of data being handled.
The shape of a distribution makes it possible to determine trends in data somewhat. You can
specify a value and calculate the probability that any data value from the distribution is, for
example, less than the specifi ed value. In other words, you can determine what percent from
the bottom that data value occurs within the distribution.
The following is a list of distributions and the description of what each one calculates.
Description
Distribution Name
Calculates the normal probability density for a specified
value.
Calculates the cumulative probability of a normal distribution
between a lower bound and an upper bound.
Calculates the boundary value(s) of a normal cumulative
probability distribution for specified values.
Calculates the Student-t probability density for a specified
value.
Calculates the cumulative probability of a Student-t
distribution between a lower bound and an upper bound.
Calculates the lower bound value of a Student-t cumulative
probability distribution for specified values.
Calculates the χ
2
probability density for a specified value.
Calculates the cumulative probability of a χ
2
distribution
between a lower bound and an upper bound.
Calculates the lower bound value of a χ
2
cumulative
probability distribution for specified values.
Calculates the F probability density for a specified value.
Normal Distribution
t Distribution
Normal Probability Density
Student-t Probability
Density
Student-t Cumulative
Distribution
Inverse Student-t
Cumulative Distribution
Inverse χ
2
Cumulative
Distribution
χ
2
Cumulative Distribution
χ
2
Probability Density
Normal Cumulative
Distribution
Inverse Normal Cumulative
Distribution
χ
2
Distribution
F Probability Density
Calculates the cumulative probability of an F distribution
between a lower bound and an upper bound.
F Cumulative Distribution
Calculates the lower bound value of an F cumulative
probability distribution for specified values.
Inverse F Cumulative
Distribution
F Distribution
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