The county highway department recorded the following probabilities for the number of accidents per day on a certain freeway for one month. the number of accidents per day and their corresponding probabilities are shown. Find the mean, variance and standard deviation . number of accidents X 0 1 2 3 4 ProbabilityP(x) 0.4 0.2 0.2 0.1 0.1
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 county highway department recorded the following probabilities for the number of accidents per day on a certain freeway for one month. the number of accidents per day and their corresponding probabilities are shown. Find the
| number of accidents X | 0 | 1 | 2 | 3 | 4 |
| ProbabilityP(x) | 0.4 | 0.2 | 0.2 | 0.1 | 0.1 |
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