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PROBABILITY

Mathematical statement about the probability of occurrence.

IT IS?

If the result of the probability is 0

It means it's not going to happen

If the result is 1 or or close.

the most possible thing is that it happen.

The sum of the possibilities must always give 1.

why?

something must happen

Complementary event.

IT IS?

It is the event that does not occur.

Mutually exclusive.

It is?

When the two events cannot occur simultaneously.

Principle of inclusion and exclusion.

Independet

happen

When the probability of their occurrence does not depend at all on the other

Independence principle.

Factorial

Product of all positive integers from 1 to N.

IT IS?

Combination

Set of elements in which the order does not matter.

Binomial formula

Ramdom variable.

The one that can take different values ​​depending on the result of the event.

Probability distribution

List or formula that gives the probability of each discrete value of a random variable.

EXPECTED VALUE

IT IS?

Sum of the product of each possible value and its corresponding probability.

Variance of a discrete random variable.

It does not matter

To the square root of the variance.