Summarizing user types
Since you can use the count() wrapper, why bother counting rows in a group as part of a grouped summary? Sometimes you want a more detailed summary, and knowing how to compute a count as part of a grouped summary that mixes numeric and categorical summaries can come in handy.
This exercise is part of the course
Introduction to Text Analysis in R
Exercise instructions
- Group 
twitter_databy whether or not a user is verified. - Compute the average number of followers for each type of user. Call this new column 
avg_followers. - Count the number of verified and non-verified users. For consistency, call this new column 
n. 
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
library(tidyverse)
twitter_data %>% 
  # Group by whether or not a user is verified
  ___(___) %>% 
  summarize(
    # Compute the average number of followers
    ___ = ___,
    # Count the number of users in each category
    ___ = ___
  )