A fast food restaurant has customers arrive at the checkout counter at a rate of 25 customers per hour. The average service time at the till is 80 seconds. a) What is the utilization? b) What is probability that there are zero customers at the counter (either in line or being served)? c) What is the probability that there are two or more customers at the checkout counter? d) What is the probability that there are 1 or 2 customers at the counter? d) What is the average number of customers waiting in line? e) If the store wanted the average time in the system to be 5 minutes, what would the service rate have to be? f) What is the probability that checkout time will take between 1 and 2 minutes? g) What is the probability that checkout time will take more than 2 minutes?

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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.