Displaying 1 result from an estimated 1 matches for "gradesbysex".
2010 Oct 29
2
wilcox.test; data type conversion?
...quot;, "VG", "G", "MVG", "G", "VG", "G", "VG")
sex <- c( "male", "male", "female", "male", "female", "male", "female", "male", "male")
gradesbysex <- data.frame(grade, sex)
The grades is in the Swedish system, where the order is G < VG < MVG
The idea is that they will investigate if they can show a grade
difference by sex (i.e. that the teacher gives better grades to boys or
girls).
Since the wilcox.test needs the order of the gr...