Name: Grouping and summarizing - The group_by verb
Uploaded: 2021-01-26T00:00:00Z
Description: So far you've been answering questions about individual country-year pairs, but you may be interested in aggregations of the data, such as the average life expectancy of all countries within each year. Here you'll learn to use the group by and summarize verbs, which collapse large datasets into manageable summaries.