R: University Lecture/Instructor Evaluations by Students at ETH
InstEval
R Documentation
University Lecture/Instructor Evaluations by Students at ETH
Description
University lecture evaluations by students at ETH Zurich,
anonymized for privacy protection. This is an
interesting “medium” sized example of a
partially nested mixed effect model.
Format
A data frame with 73421 observations on the following 7 variables.
s
a factor with levels 1:2972 denoting
individual students.
d
a factor with 1128 levels from 1:2160, denoting
individual professors or lecturers.
studage
an ordered factor with levels 2 <
4 < 6 < 8, denoting student's “age”
measured in the semester number the student has been enrolled.
lectage
an ordered factor with 6 levels, 1 <
2 < ... < 6, measuring how many semesters back the
lecture rated had taken place.
service
a binary factor with levels 0 and
1; a lecture is a “service”, if held for a
different department than the lecturer's main one.
dept
a factor with 14 levels from 1:15, using a
random code for the department of the lecture.
y
a numeric vector of ratings of lectures by
the students, using the discrete scale 1:5, with meanings
of ‘poor’ to ‘very good’.
Each observation is one student's rating for a specific lecture
(of one lecturer, during one semester in the past).
Details
The main goal of the survey is to find “the best
liked prof”, according to the lectures given.
Statistical analysis of such data has been the basis for
a (student) jury selecting the final winners.
The present data set has been anonymized and slightly
simplified on purpose.
Examples
str(InstEval)
head(InstEval, 16)
xtabs(~ service + dept, InstEval)