# BETAINV

BETAINV(probability, alpha, beta [,A] [,B])

Returns the inverse of the probability distribution function for a beta distribution.

 probability The probability associated with the distribution. alpha The parameter to the distribution. beta The parameter to the distribution. A (Optional) The lower bound to the interval of x. B (Optional) The upper bound to the interval of x.

 REMARKS
 * BETA.INV was added in Excel 2010 to replace this function.* The beta distribution is a [[continuous distribution]]* If "probability" = 0, then #NUM! is returned.* If "probability" > 1, then #NUM! is returned.* If "alpha" = 0, then #NUM! is returned.* If "beta" = 0, then #NUM! is returned.* If "A" and "B" are left blank, then the standard cumulative beta distribution is used with A = 0 and B = 1.* If "A" is left blank, then 0 is used.* If "B" is left blank, then 1 is used.* This function uses an iterative technique for calculating the function. Given a probability value, the function iterates until the result is accurate to within ±3x10-7.* If any of the arguments are not numeric, then #VALUE! is returned.* If the function does not converge after 100 iterations, then #N/A is returned.* You can use the BETA.DIST to return the probability distribution function OR the cumulative distribution function for a beta distribution.* For the Microsoft documentation refer to support.microsoft.com

 A 1 =BETAINV(0.685470581, 8, 10, 1, 3) = 2 2 =BETAINV(0.2, 1.5, 4, 1, 2) = 1.112 3 =BETAINV(0.5, 1, 2, 1, 2) = 1.293 4 =BETAINV(0.5, 1, -2, 1, 2) = #NUM! 5 =BETAINV(0, 8, 10, 1, 3) = #NUM! 6 =BETAINV(1, 8, 10, 1, 3) = #NUM! 7 =BETAINV("some text", 8, 10, 1, 3) = #VALUE!

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