condition mean min max ZT0-3 142.64999999999998 142.64999999999998 142.64999999999998 ZT4-7 203.7 203.7 203.7 ZT8-11 250.45000000000002 250.45000000000002 250.45000000000002 ZT12-15 250.2 250.2 250.2 ZT16-19 247.14999999999998 247.14999999999998 247.14999999999998 ZT20-23 200.8 200.8 200.8