treatment	y
A	11.82
A	13.03
A	10.78
A	14.31
A	14.21
A	8.56
B	15.46
B	12.90
B	14.88
B	13.75
B	18.59
B	13.80
C	15.43
C	14.28
C	14.76
C	12.07
C	13.80
C	13.46
