condition mean min max ZT0-3 12.720600000000001 12.720600000000001 12.720600000000001 ZT4-7 10.395150000000001 10.395150000000001 10.395150000000001 ZT8-11 11.1964 11.1964 11.1964 ZT12-15 12.506150000000002 12.506150000000002 12.506150000000002 ZT16-19 15.1947 15.1947 15.1947 ZT20-23 13.172699999999999 13.172699999999999 13.172699999999999