condition mean min max ZT0-3 154.616672 154.616672 154.616672 ZT4-7 109.696997 109.696997 109.696997 ZT8-11 94.8069405 94.8069405 94.8069405 ZT12-15 97.74924250000001 97.74924250000001 97.74924250000001 ZT16-19 101.8331485 101.8331485 101.8331485 ZT20-23 128.1158415 128.1158415 128.1158415