6. Patients arrive at the emergency room in a certain hospital according to a Poisson Process. The probability that there are no arrivals at all during a period of one hour is 0.00451658. (a) What is the expected number of arrivals during a period of one hour? (b) What is the probability that the number of arrivals in one hour is more than 2 standard deviations above the expected number of arrivals?

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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.