condition mean min max ZT0-3 577.75 577.75 577.75 ZT4-7 1400.2 1400.2 1400.2 ZT8-11 1426.6 1426.6 1426.6 ZT12-15 1355.65 1355.65 1355.65 ZT16-19 1354.45 1354.45 1354.45 ZT20-23 1047.25 1047.25 1047.25