condition mean min max ZT0-3 1109.232057 1109.232057 1109.232057 ZT4-7 1303.168291 1303.168291 1303.168291 ZT8-11 1334.918763 1334.918763 1334.918763 ZT12-15 1228.693217 1228.693217 1228.693217 ZT16-19 1264.020518 1264.020518 1264.020518 ZT20-23 1436.535139 1436.535139 1436.535139