The expected level analysis associated with the test on old_data and new_data by the grouping variable. See the tests for input arguements. The variables are as follows:
expected_level
A data frame with 9 rows and 3 variables:
The original outcome of interest
The revised outcome of interest
Year the data was "collected"
The group associated with the outcome
The percentage difference between new_outcome and old_outcome
The maximum absolute percentage difference in each group
The mean absolute percentage difference in each group
The ranking of the differences in the outcome variable between the new and old data where 1 is the greatest mean_abs_pert_diff.