condition mean min max ZT0-3 384.122668 384.122668 384.122668 ZT4-7 418.5027955 418.5027955 418.5027955 ZT8-11 572.5884404999999 572.5884404999999 572.5884404999999 ZT12-15 566.9887835 566.9887835 566.9887835 ZT16-19 559.6579710000001 559.6579710000001 559.6579710000001 ZT20-23 338.81771200000003 338.81771200000003 338.81771200000003