condition mean min max ZT0-3 43.20095 39.3925 46.2962 ZT4-7 42.697199999999995 42.697199999999995 42.697199999999995 ZT8-11 11.2334 11.2334 11.2334 ZT12-15 7.1369525 6.76456 7.509345 ZT16-19 7.890915 7.890915 7.890915 ZT20-23 14.834150000000001 14.834150000000001 14.834150000000001