Ratio

Height^a

1.0

66.1bc^b

1.5

69.3^abc

2.0 ^c

69.5^ab

3.0

70.2^a

4.0 (2.0/0.5)

67.4^abc

4.0 (1.0/0.25)

65.4^c

se^d

1.75

Pr > F

0.001