A fair coin is tossed until heads appear for the third time. Let the random variable X be the number of tails shown up to that point. What is the p.m.f of X? What are the expected value and standard deviation of X?

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear re…

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.