condition mean min max ZT0-3 160.851161 160.851161 160.851161 ZT4-7 116.50249600000001 116.50249600000001 116.50249600000001 ZT8-11 18.562616 18.562616 18.562616 ZT12-15 13.3816295 13.3816295 13.3816295 ZT16-19 21.780523000000002 21.780523000000002 21.780523000000002 ZT20-23 25.719606 25.719606 25.719606