The average number of calls received by a switchboard in a 30-minute period is 18.
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.
The average number of calls received by a switchboard in a 30-minute period is 18.
What is the probability that between 10:00 and 10:30 the switchboard will receive exactly 15 calls? (Round to four decimal places. Do not use %)
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