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UsefulExcel Functions for quantiles of various statistical distributions FINV(probability,degrees_freedom1,degrees_freedom2) Probability is a probability associated with the F cumulative distribution. Degrees_freedom1 is the numerator degrees of freedom. Degrees_freedom2 is the denominator degrees of freedom. Returns the inverse of the F probability distribution. If p = FDIST(x,...), then FINV(p,...) = x. TINV(probability,degrees_freedom) Probability is the probability associated with the two-tailed Student's t-distribution. Degrees_freedom is the number of degrees of freedom with which to characterize the distribution NORMINV(probability,mean,standard_dev) NORMDIST(x,mean,standard_dev,cumulative) NORMSDIST(z) s for standard Z is the value for which you want the distribution. NORMSINV(probability) standard normal quantiles Probability is a probability corresponding to the normal distribution. CHIINV(probability,degrees_freedom) for quantiles Probability is a probability associated with the chi-squared distribution. Degrees_freedom is the number of degrees of freedom. CHIDIST(x,degrees_freedom) X is the value at which you want to evaluate the distribution. Degrees_freedom is the number of degrees of freedom.