Data set

formulations

Hogstrom [35]

Flesch et al. [23]

Dyer and Hicks [36] Dyer [39]

Hogstrom [37]

1

1.21 (0.84)

1.11 (0.82)

1.19 (0.84)

1.19 (0.83)

2

1.03 (0.76)

0.93 (0.73)

1.01 (0.75)

1.00 (0.75)

3

1.38 (0.78)

1.29 (0.76)

1.36 (0.78)

1.36 (0.78)

4

1.05 (0.77)

0.95 (0.75)

1.03 (0.77)

1.02 (0.77)

5

1.11 (0.89)

1.03 (0.87)

1.09 (0.89)

1.09 (0.89)

6

1.27 (0.81)

1.19 (0.80)

1.25 (0.81)

1.25 (0.81)