condition mean min max ZT0-3 1218.095 1218.095 1218.095 ZT4-7 1003.3275 1003.3275 1003.3275 ZT8-11 841.6555000000001 841.6555000000001 841.6555000000001 ZT12-15 1156.03 1156.03 1156.03 ZT16-19 1394.6799999999998 1394.6799999999998 1394.6799999999998 ZT20-23 1266.5700000000002 1266.5700000000002 1266.5700000000002