condition mean min max ZT0-3 259.55 259.55 259.55 ZT4-7 168.3 168.3 168.3 ZT8-11 122.19999999999999 122.19999999999999 122.19999999999999 ZT12-15 266.45 266.45 266.45 ZT16-19 233.45 233.45 233.45 ZT20-23 188.35 188.35 188.35