condition mean min max ZT0-3 625.1 625.1 625.1 ZT4-7 685.1 685.1 685.1 ZT8-11 766.95 766.95 766.95 ZT12-15 554.4 554.4 554.4 ZT16-19 810.55 810.55 810.55 ZT20-23 750.25 750.25 750.25