The random variable ?, which is the number of telephones coming to a telephone exchange in a 2-minute period, has a possion distribution. (?=1)=0.149 and ? (? = 2) = 0.224 are given. a. Calculate the probability that the random variable X is equal to zero. b. What is the average and variance of the number of phones coming to this telephone exchange in 6 minutes?
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 random variable ?, which is the number of telephones coming to a telephone exchange in a 2-minute period, has a possion distribution. (?=1)=0.149 and ? (? = 2) = 0.224 are given. a. Calculate the
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