A small data set randomly generated to simulate 100 observation on an hypothetical survey with 10 columns. Include NA's.
The variables are :
subject A numeric. Unique number of the subject.
initial A character. Initials of the subject.
birth Birthdate
sex A factor with levels male female
study_level An ordered factor with levels primary < secondary < superior
heigh A numeric
weight A numeric
siblings A numeric
Q1 A numeric : question 1
Q2 A numeric : question 2
A data frame with 100 rows and 10 variables
bad_database, a version closer to a real-life database.
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