CHIDISTCalculates the right-tailed chi-squared distribution, often used in hypothesis testing.
x – The input to the chi-squared probability distribution function. The value at which to evaluate the function.
Must be a positive number.
degrees_freedom – The number of degrees of freedom of the distribution.
degrees_freedom is truncated to an integer if a non-integer is provided.
degrees_freedom must be at least 1 and may not exceed 10^10.
All arguments must be numeric.
CHIDIST is synonymous with CHISQ.DIST.RT.
CHIINV: Calculates the inverse of the right-tailed chi-squared distribution.
CHISQ.DIST: Calculates the left-tailed chi-squared distribution, often used in hypothesis testing.
CHISQ.DIST.RT: Calculates the right-tailed chi-squared distribution, which is commonly used in hypothesis testing.
CHITEST: Returns the probability associated with a Pearson’s chi-squared test on the two ranges of data. Determines the likelihood that the observed categorical data is drawn from an expected distribution.
FDIST: Calculates the right-tailed F probability distribution (degree of diversity) for two data sets with given input x. Alternately called Fisher-Snedecor distribution or Snedecor’s F distribution.
GAMMADIST: Calculates the gamma distribution, a two-parameter continuous probability distribution.
TDIST: Calculates the probability for Student’s t-distribution with a given input (x).
Suppose you want to test the fairness of a 6-sided die:
From several rolls, you obtain a chi-squared statistic of 12.3.
The number of degrees of freedom is 6 – 1 = 5.
We will evaluate the chi-squared distribution with 5 degrees of freedom when x equals 12.3.