Fictional data, with more extreme preferences than Music_preferences
A 4-by-3 table, with a column for each major and a row for each type of music.
data("Music_preferences2")
Music_preferences2
#>       Pop Rock Jazz Classic
#> Psych 151  130   12       7
#> Econ   77    6  111       4
#> Law     0    4    2     165
Other effect size datasets: 
Music_preferences,
RCT_table,
Smoking_FASD,
food_class,
hardlyworking,
rouder2016,
screening_test