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The Tetracycline1 data frame has 40 rows and 4 columns.
Tetracycline1
This data frame contains the following columns:
a numeric vector
an ordered factor with levels 5 < 3 < 2 < 4 < 1
5
3
2
4
1
a factor with levels tetrachel tetracyn
tetrachel
tetracyn
# NOT RUN { str(Tetracycline1) # }
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