Answer
The part of this study that represents the descriptive branch of statistics involves the statement "20% [of 202 pilots] admit that they have made a serious error due to sleepiness." A possible inference based on the results of the survey is that pilots need more time to rest before and in between flights in order to avoid accidents.
Work Step by Step
Descriptive statistics is the branch of statistics that involves organization, summarization, and display of data. The statement, "20% [of 202 pilots] admit that they have made a serious error due to sleepiness." summarizes the results of the survey. Using inferential statistics, we were able to make a conclusion about the population using a sample. The conclusion is that pilots need more sleep before and in between flights in order to avoid accidents.
