Let's say you own a clothing retail shop and are trying to price a prom dress. You compute a mean of X = $485 and a standard deviation of S = $15 using a sample of n = 35 regional store prices. You're thinking of raising the price to $490 and would like to know if it's possible to have gotten a sample mean of $485 when really the population mean is $490. You decide to test the following hypothesis using a = 0.05. Could the average dress price in your region actually be this high?

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Contingency Table

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 relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

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.