NEGBINOMDIST |
NEGBINOMDIST(number_f, number_s, probability_s) |
Returns the probability distribution function for a negative binomial distribution (no cumulative). |
number_f | The number of failures. |
number_s | The threshold number of successes. |
probability_s | The probability of a success. |
REMARKS |
* This function is only available for backwards compatibility and should not be used. * NEGBINOM.DIST was added in Excel 2010 to replace this function and include an option for cumulative probability. * The negative binomial distribution is a discrete distribution * This function returns the probability that there will be "number_f" failures before the "number_s"-th success, when the constant probability of a success is "probability_s". * For example, you need to find 10 people with excellent reflexes, and you know the probability that a candidate has these qualifications is 0.3. * This function calculates the probability that you will interview a certain number of unqualified candidates before finding all 10 qualified candidates. * The "number_f" and "number_s" are truncated to integers. * If any of the arguments are not numeric, then #VALUE! is returned * If "probability_s" < 0, then #NUM! is returned. * If "probability_s" > 1, then #NUM! is returned. * If ("number_f" + "number_s" - 1) = 0, then #NUM! is returned. * The equation for the negative binomial distribution is: ?? * For the Microsoft documentation refer to support.microsoft.com * For the Google documentation refer to support.google.com |
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