Probability

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Probability

</dt>
The chance that a prescribed event will occur, represented as a pure number P in the range 0<P<1. The probability of an impossible event is zero and that of an inevitable event is unity. </dd>
Probability is estimated empirically by relative frequency, that is, the number of times the particular event occurs divided by the total count of all events in the class considered. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use