Answer:
4. descriptive statistics
Explanation:
According to my research on different experiment terminology, I can say that based on the information provided within the question the average number of accidents is an example of a descriptive statistic. This is because this term refers to a brief descriptive statement that summarizes (average) a given set of data gathered from an experiment or research. Since the information provided is an average of all the data gathered from a research on traffic accidents then we can say it is a descriptive statistic.
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