Determine the marginal PMF of A and B and then calculate the expected number of customers in line at the express checkout. d. If at a given time there are 3 customers in line at the express checkout, what is the probability of 2 customers being in line at the super-express checkout? e. By inspection of the probabilities P(A = 4), P(B = 0), and P(A = 4, B = 0), are A and B independent random variables? Explain.
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.
Determine the marginal PMF of A and B and then calculate the expected number of
customers in line at the express checkout.
d. If at a given time there are 3 customers in line at the express checkout, what is the probability
of 2 customers being in line at the super-express checkout?
e. By inspection of the
independent random variables? Explain.
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