Documentation/How Tos/Calc: NEGBINOMDIST function

CALC FUNCTIONS

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Measures of dispersion / spread

• Devsq
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Probability and statistics

• B
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Correlation and line fitting

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See also (in the Array Function category); GROWTH, LINEST, LOGEST, TREND

Ranking

• Large
• Max
• Maxa
• Min
• Mina
• Percentile
• Percentrank
• Quartile
• Rank
• Small

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NEGBINOMDIST

Calculates probabilities for a negative binomial distribution.

Syntax:

NEGBINOMDIST(x; r; p)

For independent trials each with a probability p of success, NEGBINOMDIST returns the probability that there will be exactly x failures before there have been r successes. The formula used is:

Example:

NEGBINOMDIST(1; 1; 0.5)

returns 0.25 (25%), the probability that heads will come up exactly once before tails has come up when tossing a coin.

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See Also

• BINOMDIST

• Statistical functions

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