Answer
The mean of a discrete random variable x is the value that is expected to occur per repetition. On average, if an experiment is repeated a large number of times the average will be denoted by μ and calculated as $μ = ∑xP(x)$. The discrete random variable x is also called its expected value and is denoted by $E(x) = ∑xP(x)$
The standard deviation of a discrete random variable x measures the spread of its probability distribution and is computed as $\sqrt∑(x^{2}P(x) - μ^{2})$.
Work Step by Step
See above.
