condition mean min max ZT0-3 77.487 77.487 77.487 ZT4-7 48.75095 48.75095 48.75095 ZT8-11 36.06005 36.06005 36.06005 ZT12-15 42.639 42.639 42.639 ZT16-19 62.62035 62.62035 62.62035 ZT20-23 75.80485 75.80485 75.80485