condition mean min max ZT0-3 0.8274144999999999 0.7869189999999999 0.86791 ZT4-7 0.7805755 0.7805755 0.7805755 ZT8-11 2.54457 2.54457 2.54457 ZT12-15 0 0 0 ZT16-19 2.4932 2.4932 2.4932 ZT20-23 1.879215 1.879215 1.879215