condition mean min max ZT0-3 64.4296 64.4296 64.4296 ZT4-7 32.842 32.842 32.842 ZT8-11 21.1059 21.1059 21.1059 ZT12-15 60.169200000000004 60.169200000000004 60.169200000000004 ZT16-19 85.08840000000001 85.08840000000001 85.08840000000001 ZT20-23 87.49705 87.49705 87.49705