Probability of Discrete Random Variable Flashcards
a numerical measure of the likelihood that a specific event will occur
Probability
The probability of an event always lies in the range 0 to 1
Property 1
The sum of the probabilities of all simple events (or final outcomes) for an experiment denoted by EP(Ei), is always 1
Property 2
consists of the value a random variable can assume and the corresponding probabilities of the values
DISCRETE PROBABILITY DISTRIBUTION
the probabilities are determined theoretically or by observation
DISCRETE PROBABILITY DISTRIBUTION
for a discrete random variable, the probability distribution is defined by a probability mass function denoted by P(X)
DISCRETE PROBABILITY DISTRIBUTION
is found by multiplying the square of each outcomes by its corresponding probability, summing these products, and subtracting the square of the mean
VARIANCE OF A DISCRETE PROBABILITY DISTRIBUTION