. The average number of liters of water that a person consume in a month is 12 liters. Assume that the standard deviation is 4.5 liters and the distribution is approximately normal.   a. Find the probability that a person selected at random consumes more than 13 liters per month. b. If a sample of 20 individuals is selected, find the probability that mean of the sample will be more than 13 liters.

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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.