condition mean min max ZT0-3 111.30898 111.30898 111.30898 ZT4-7 35.003385 35.003385 35.003385 ZT8-11 26.737882 26.737882 26.737882 ZT12-15 16.5289925 16.5289925 16.5289925 ZT16-19 21.282511 21.282511 21.282511 ZT20-23 27.4202 27.4202 27.4202