condition mean min max ZT0-3 3470.962719 3470.962719 3470.962719 ZT4-7 3999.7190005 3999.7190005 3999.7190005 ZT8-11 3388.257369 3388.257369 3388.257369 ZT12-15 3019.64138 3019.64138 3019.64138 ZT16-19 2755.8300975 2755.8300975 2755.8300975 ZT20-23 2800.1144560000002 2800.1144560000002 2800.1144560000002