condition mean min max ZT0-3 936.75 936.75 936.75 ZT4-7 1612.5 1612.5 1612.5 ZT8-11 1589.55 1589.55 1589.55 ZT12-15 1133.4 1133.4 1133.4 ZT16-19 663.9 663.9 663.9 ZT20-23 559.15 559.15 559.15