Difference between revisions of "Documentation/How Tos/Calc: POISSON function"
From Apache OpenOffice Wiki
< Documentation | How Tos
m (→Syntax:) |
m (→Example:) |
||
| Line 16: | Line 16: | ||
=== Example: === | === Example: === | ||
<tt>'''POISSON(8; 9; 0)'''</tt> | <tt>'''POISSON(8; 9; 0)'''</tt> | ||
| − | : returns approximately 0.1317, the | + | : returns approximately 0.1317, the probability that exactly 8 events occur in a time period where you expect 9 events. |
<tt>'''POISSON(8; 9; 1)'''</tt> | <tt>'''POISSON(8; 9; 1)'''</tt> | ||
| − | : returns approximately 0.4556, the | + | : returns approximately 0.4556, the probability that up to and including 8 events occur in a time period where you expect 9 events. |
=== See also: === | === See also: === | ||
[[Documentation/How_Tos/Calc: Statistical functions|'''Statistical functions''']] | [[Documentation/How_Tos/Calc: Statistical functions|'''Statistical functions''']] | ||
Revision as of 18:03, 19 May 2008
POISSON
Calculates values for a Poisson distribution.
Syntax:
POISSON(x; λ; mode)
- The Poisson distribution is a discrete probability distribution giving the probability that x events occur in a certain time, where events occur independently, and where on average λ events are expected.
- If mode is 0, POISSON calculates the probability density function of the Poisson distribution:
- If mode is 1, POISSON calculates the cumulative distribution function of the Poisson distribution:
Example:
POISSON(8; 9; 0)
- returns approximately 0.1317, the probability that exactly 8 events occur in a time period where you expect 9 events.
POISSON(8; 9; 1)
- returns approximately 0.4556, the probability that up to and including 8 events occur in a time period where you expect 9 events.
