Chi Square Distribution Formula. The value x such that the right tail of the chi square distribution with area α occurs at x. The actual counts are from observations the expected counts are typically determined from probabilistic or other mathematical models.
More generally if chi i 2 are independently distributed according to a chi 2 distribution with r 1 r 2 r k degrees of freedom then sum j 1 kchi j 2 2 is distributed according to chi 2 with. 6 expected number is. A positive integer k that specifies the number of degrees of freedom the number of zi s.
Chiinv α df the value x such that chidist x df 1 α.
A positive integer k that specifies the number of degrees of freedom the number of zi s. This means that f x 1 α where f is the cumulative chi square distribution function. The value x such that the right tail of the chi square distribution with area α occurs at x. More generally if chi i 2 are independently distributed according to a chi 2 distribution with r 1 r 2 r k degrees of freedom then sum j 1 kchi j 2 2 is distributed according to chi 2 with.
