What is the formula for mean?, What is the formula for variance?, It is a measure of variability that can be obtain by getting the square root of the variance., It refers to the probability that a discrete random variable will be equal to a value., It's a probability distribution that use cumulative approach to determining how likely it is that the variable will fall within a specific range or below a certain threshold., It is a measure of central tendency which is also known as the average or the expected value (E)., An illustration that gives the probability from each value of the random variable., What are the two requirements for probability distribution?

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