condition mean min max ZT0-3 80.683175 75.33365 86.0327 ZT4-7 61.619200000000006 61.619200000000006 61.619200000000006 ZT8-11 94.2031 94.2031 94.2031 ZT12-15 0 0 0 ZT16-19 103.3314 103.3314 103.3314 ZT20-23 113.62899999999999 113.62899999999999 113.62899999999999