condition mean min max ZT0-3 41.711775 41.6945 41.72905 ZT4-7 70.31785 70.31785 70.31785 ZT8-11 101.2116 101.2116 101.2116 ZT12-15 0 0 0 ZT16-19 59.86195 59.86195 59.86195 ZT20-23 63.79495 63.79495 63.79495