condition mean min max ZT0-3 72.6 72.6 72.6 ZT4-7 163.3 163.3 163.3 ZT8-11 185.25 185.25 185.25 ZT12-15 159.20000000000002 159.20000000000002 159.20000000000002 ZT16-19 98.1 98.1 98.1 ZT20-23 123.7 123.7 123.7