condition mean min max ZT0-3 32.4447 28.99355 35.895849999999996 ZT4-7 41.742450000000005 41.742450000000005 41.742450000000005 ZT8-11 64.3618 64.3618 64.3618 ZT12-15 0 0 0 ZT16-19 64.54415 64.54415 64.54415 ZT20-23 44.9798 44.9798 44.9798