tally_schools: Tally schools and students in a given dataset
Description
Returns a count of schools, without printing
anything.
Usage
tally_schools(data, school.id, treatment)
Value
List of two things: school and student counts (invisible).
Arguments
- data
Dataset (student level)
- school.id
String name of ID column in data (the grouping variable)
- treatment
String name of the treatment variable.