condition mean min max ZT0-3 6.45442978925 5.257226826 7.6516327525 ZT4-7 12.38375397825 11.469379400000001 13.2981285565 ZT8-11 19.69722955 18.52992213 20.86453697 ZT12-15 15.224534092499999 13.525321954999999 16.92374623 ZT16-19 14.0415852025 13.465134565 14.618035840000001 ZT20-23 11.3493493265 10.486983038000002 12.211715615