perc_diff() perc_diff_df()

perc_diff()

perc_diff_df()

Calculate percentile differences from an ordered categorical variable and a continuous variable.

perc_dist()

Calculate a distribution of percentiles from an ordered categorical variable and a continuous variable.

pisa_2006

Mathematics test scores of Spain, Germany and Estonia in the PISA 2006 test

pisa_2012

Mathematics test scores of Spain, Germany and Estonia in the PISA 2012 test