A travel agency wants to determine if the length ofcustomers’ phone calls can be adequately modeled by anexponential distribution. Last week, the agency recorded thelength of all phone calls and obtained the following results (in seconds): 4, 6, 5, 8, 9, 10, 12, 8, 16, 20, 24, 27, 33, 37,43, 50, 58, 68, 70, 78, 88, 100, 120, 130. Do these dataindicate that the length of phone calls to the travel agencyis governed by an exponential distribution?
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.
A travel agency wants to determine if the length of
customers’ phone calls can be adequately modeled by an
exponential distribution. Last week, the agency recorded the
length of all phone calls and obtained the following results
(in seconds): 4, 6, 5, 8, 9, 10, 12, 8, 16, 20, 24, 27, 33, 37,
43, 50, 58, 68, 70, 78, 88, 100, 120, 130. Do these data
indicate that the length of phone calls to the travel agency
is governed by an exponential distribution?
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