Let X be the random variable representing the number of calls received in an hour by a 911 emergency service. A probability distribution of X is given below. Value of X 0 1 2 3 4 Probability P(x) 0.34 ____ ____ 0.14 0.04 (a) Suppose the probability that X = 1 and the probability that X = 2 are the same. What are these probabilities?(b) What is the probability that at least one call received in an hour?(c) What is the expected number of 911 calls in an hour?
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.
Let X be the random variable representing the number of calls received in an hour by a 911 emergency service. A
| Value of X | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Probability P(x) | 0.34 | ____ | ____ | 0.14 | 0.04 |
(a) Suppose the probability that X = 1 and the probability that X = 2 are the same. What are these probabilities?
(b) What is the probability that at least one call received in an hour?
(c) What is the expected number of 911 calls in an hour?
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