### BETA.DIST(x, alpha, beta, cumulative, [,A] [,B])

Returns the probability of getting less than or equal to a particular value in a beta distribution.

 x The number between A and B from the distribution. alpha The first parameter to the distribution. beta The second parameter to the distribution. cumulative The type of function to use:True = cumulative probability function (less than)False = probability density function (equal to) A (Optional) The lower bound to the interval of x. B (Optional) The upper bound to the interval of x.

#### Remarks

 * Added in Excel 2010.* This function replaces the BETADIST function and to make it more consistent with the NORMDIST function.* The beta distribution is a continuous distribution.* If "cumulative" = True, then the area under the curve to the left of "x" is returned. This uses the cumulative probability function.* If "cumulative" = False, then the height of the bell shaped curve at "x" is returned. This uses the probability density function.* If "A" is left blank, then ??* If "B" is left blank, then ??* All the values are greater than zero* If the parameters are equal, the distribution is symmetrical.* If either parameter is 1 and the other parameter is greater than 1, the distribution is J-shaped.* If alpha is less than beta, the distribution is said to be positively skewed (most of the values are near the minimum value).* If alpha is greater than beta, the distribution is negatively skewed (most of the values are near the maximum value).* For the Microsoft documentation refer to support.microsoft.com

 A 1 =BETA.DIST(2,8,10,TRUE,1,3) = 0.685 2 =BETA.DIST(-2,8,10,TRUE,-5,3) = 0.282 3 =BETA.DIST(3,1,1,TRUE,2,3) = 1 4 =BETA.DIST(3,1,1,TRUE,,3) = 1 5 =BETA.DIST(3,-1,1,TRUE,2,2) = #NUM! 6 =BETA.DIST(3,1,1,TRUE,2,) = #NUM! 7 =BETA.DIST(3,1,-1,TRUE,2,2) = #NUM! 8 =BETA.DIST(3,1,1,TRUE,2,2) = #NUM! 9 =BETA.DIST(3,1,1,TRUE,2,"some text") = #VALUE!