यदि X और Y का संयुक्त संचयी वितरण फलन (joint cumulative distribution function) इस प्रकार दिया गया है: FXY(x, y) = 1 - e-x - e-y + e-(x+y) जहाँ x > 0, y > 0, और अन्यत्र 0 है, तो प्रत्याशित मान (expected values) E(X) और E(Y) क्रमशः हैं:

The mean and standard deviation of a Binomial distribution with parameters n, p, and q (where q = 1 - p) are respectively:

In a Binomial Distribution, the formula for calculating the standard deviation is:

Given below are two statements: Statement I: The F-distribution is defined as the ratio of two independent chi-square random variables, each divided by its respective degrees of freedom. Statement II: The Student's t-distribution is symmetric about the origin (mean = 0) with a bell shape similar to the standard normal distribution.