This data set comes from Section 52.27.

Plant length (m) for different lighting levels

Light,Height
Normal,41
Normal,52
Normal,49
Normal,34
Normal,38
Normal,42
Normal,38
Normal,43
Normal,51
Normal,41
Normal,42
Normal,32
Normal,39
Normal,40
Normal,33
High,79
High,82
High,67
High,75
High,89
High,71
High,77
High,78
High,89
High,77
High,75
High,76
High,85
High,88
High,90