condition mean min max ZT0-3 212.35000000000002 212.35000000000002 212.35000000000002 ZT4-7 262.7 262.7 262.7 ZT8-11 232.65 232.65 232.65 ZT12-15 261.2 261.2 261.2 ZT16-19 198.65 198.65 198.65 ZT20-23 210.65 210.65 210.65