condition mean min max ZT0-3 3315.053058 3315.053058 3315.053058 ZT4-7 3315.3194685 3315.3194685 3315.3194685 ZT8-11 3966.831519 3966.831519 3966.831519 ZT12-15 3357.6376419999997 3357.6376419999997 3357.6376419999997 ZT16-19 4082.210108 4082.210108 4082.210108 ZT20-23 3907.2533320000002 3907.2533320000002 3907.2533320000002