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Because probability is measured from zero to one, where zero means something cannot happen and one meaning it will definitely happen. This can also be looked at as there being a 0% chance or 100% chance of it happening. So obviously there can not be less of a chance than it definitely not happening, so it cannot be less than zero.

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โˆ™ 2015-08-11 18:02:48
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Probability

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Q: Why can't probability be less than 0?
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Why cannot a probability not be less than 0?

0 means there is no chance of something happening. You cannot have less than no chance of something happening. So a probability cannot be less than 0.


When probability is less then 0 what happen?

Probability can not be less than 0 or greater than 1. A probability of 0 means there is no possibility whatsoever of an event occurring. A probability of 1 means that the event is guaranteed to occur no matter what.


Can a probability be more than 1 or less than 0?

No. A probability of 1 means something will definitely happen. There cannot be a greater certainty than that, so probability cannot be greater than 1. 0 means there is no chance of something happening. You cannot have less than no chance of something happening. So a probability cannot be less than 0.


Can the value of probability be less than zero?

No. Probability must be between 0 and 1.


Why the probability can never be 1 or less than 0?

Probability of 0 is impossible, and 1 is certain. So, probability must be between 0 and 1, inclusive.


Can probability be less than 0?

No, it must be a number in the interval [0, 1].


Can the probability be more than 1 or less than 0?

No, all probabilities are given from a scale of 0 to 1. 0 represents 0% and 1 represents a 100% probability.


What can a probability number be larger than?

Larger or equal to 0 but less than or equal to 1


Which is not a possible vaule for a probability?

Probability value can only be real number between 0 to 1, therefore, it cannot be greater than 1 or less than 0 or a complex number.


Given a standardized normal distribution with a mean of 0 and a deviation of 1 what is the probability that Z is less than 1.51?

From the related link, you can read directly the probability that Z is less than 1.51 is 0.9345.


Why cant a probability be less than 0?

How would you interpret such a probability? - A probability of zero means that something is IMPOSSIBLE, while a probability of one means that it is SURE TO HAPPEN. Anything in between means that it MAY happen - the closer to 1, the more likely it is to happen. Anything outside of that range simply doesn't make sense.


What are Synonyms of probability from likely to least likely?

certainty (no doubt), probability or likelihood (greater than 50% chance), possibility (greater than 0% but less than 50% chance)

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