condition mean min max ZT0-3 413.5 413.5 413.5 ZT4-7 268.5 268.5 268.5 ZT8-11 279.4 279.4 279.4 ZT12-15 398.1 398.1 398.1 ZT16-19 391.45000000000005 391.45000000000005 391.45000000000005 ZT20-23 463.5 463.5 463.5