BETA.DIST |
| BETA.DIST(x, alpha, beta, cumulative [,A] [,B]) |
Returns the probability distribution function OR the cumulative probability function for a beta distribution. |
| x | The number between A and B from the distribution. |
| alpha | The first parameter. |
| beta | The second parameter. |
| cumulative | A logical value indicating the type of function to use: False (or 0) = individual probability (equal to) True (<> 0) = cumulative probability (equal to or less than) |
| A | (Optional) The lower bound to the interval of x (0..1) (0) |
| B | (Optional) The upper bound to the interval of x (0..1) (1) |
| REMARKS |
| * For an illustrated example refer to the page under Distributions * The beta distribution is a continuous distribution * This function is a two variable function. * If "alpha" = "beta", the distribution is symmetrical. * If "alpha" = 1 and "beta" > 1, the distribution is J-shaped. * If "alpha" > 1 and "beta" = 1, the distribution is J-shaped. * If "alpha" < "beta", the distribution is said to be positively skewed (most of the values are near the minimum value). * If "alpha" > "beta", the distribution is negatively skewed (most of the values are near the maximum value). * If "cumulative" = False, then the height of the curve at "x" is returned. * If "cumulative" = True, then the area under the curve to the left of "x" is returned. * If "A" is left blank, then 0 is used. * If "B" is left blank, then 1 is used. * You can use the BETA.INV function to return the inverse of the cumulative probability function for a beta distribution. * You can use the GAMMA.DIST function to return the probability function OR the cumulative probability function for a gamma distribution. * This function was added in Excel 2010 to replace the BETADIST function and include an option for probability distribution. * For the Microsoft documentation refer to support.microsoft.com |
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