condition mean min max ZT0-3 392.530177825 373.35081975 411.7095359 ZT4-7 116.19888239000001 97.089928345 135.307836435 ZT8-11 158.445205525 120.7232344 196.16717665 ZT12-15 143.27608578 119.96532797999998 166.58684358 ZT16-19 154.28089039999998 147.54956965 161.01221114999998 ZT20-23 123.7180624925 108.67946503499999 138.75665995