The number of calls to a 24-hour service “hotline" follows a Poisson distribution with a mean of 2.5 calls per hour. а. What is the probability that exactly three calls arrive during an hour? What is the probability that exactly six calls arrive during a two-hour period? The time between calls is exponentially distributed with a mean of 24 minutes. What is the probability that more than one hour elapses between calls to the "hotline"? b.

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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.