condition mean min max ZT0-3 390.075354 390.075354 390.075354 ZT4-7 419.644192 419.644192 419.644192 ZT8-11 370.283591 370.283591 370.283591 ZT12-15 391.51833250000004 391.51833250000004 391.51833250000004 ZT16-19 329.6239815 329.6239815 329.6239815 ZT20-23 294.48434799999995 294.48434799999995 294.48434799999995