n Deaths Driver Intoxicated? Pedestrian Intoxicated? Yes No
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 table summarizes results from pedestrian deaths that were caused by automobile accidents.
Pedestrian Deaths
| Driver Intoxicated? |
Pedestrian Intoxicated? | |
|---|---|---|
| Yes | No | |
| Yes | 63 | 69 |
| No | 278 | 579 |
If two different pedestrian deaths are randomly selected, find the probability that they both involved drivers that were intoxicated.
Report the answer rounded to four decimal place accuracy.
| Pedestrians Intoxicated | Pedestrians Not intoxicated | Total | |
| Drivers Intoxicated | 63 | 6 | 69 |
| Drivers Not intoxicated | 278 | 301 | 579 |
| Total | 341 | 307 | 648 |
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