condition mean min max ZT0-3 24.816403 24.816403 24.816403 ZT4-7 26.415426 26.415426 26.415426 ZT8-11 30.627073000000003 30.627073000000003 30.627073000000003 ZT12-15 24.05849 24.05849 24.05849 ZT16-19 37.976746 37.976746 37.976746 ZT20-23 36.3770795 36.3770795 36.3770795