condition mean min max ZT0-3 268.7 268.7 268.7 ZT4-7 284.9 284.9 284.9 ZT8-11 297.20000000000005 297.20000000000005 297.20000000000005 ZT12-15 210.8 210.8 210.8 ZT16-19 272.25 272.25 272.25 ZT20-23 284.9 284.9 284.9