ABC bank has a single drive-in teller serving the customers in their cars. On average 13 customers arrive every hour. Average service time for each customer is 4 minutes, Assume Poisson distribution for arrivals and exponential distribution for service time. What is the average time (in minutes) a customer spends in system? Select one: O a. 2.143 O b. 52 c. 4 d. 4.615 e 30

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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.