condition mean min max ZT0-3 503.4 503.4 503.4 ZT4-7 210.2 210.2 210.2 ZT8-11 169.55 169.55 169.55 ZT12-15 330.95 330.95 330.95 ZT16-19 511.75 511.75 511.75 ZT20-23 698.2 698.2 698.2