chisquareden

This function is the chi-square probability density function. It returns the value of the slope of the cumulative distribution function at the specified argument value.

Syntax

chisquareden(x,n)

The x argument represents the independent variable and can either be a scalar or a range of numbers. If x is a range, then it must be defined by either using braces { } or by specifying a worksheet column. Any value for x must be non-negative. The n argument can be any positive integer and equals the degrees of freedom.

Example

The density function can be used to estimate the probability that the values of a chi-square distributed random variable X lie in a small interval. If X has 8 degrees of freedom, then to estimate the probability that the values of X lie between 5 and 5.1, multiply the density of X at 5 by the length of the interval .1:

chisquareden(5,8) * .1 = .10688

関連情報

• chisquaredist
• chisquareinv