condition mean min max ZT0-3 1.10362 1.10362 1.10362 ZT4-7 0.5892325 0.5892325 0.5892325 ZT8-11 0.699282 0.699282 0.699282 ZT12-15 1.4207355 1.4207355 1.4207355 ZT16-19 2.80032 2.80032 2.80032 ZT20-23 2.040695 2.040695 2.040695