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