condition mean min max ZT0-3 102.308984 102.308984 102.308984 ZT4-7 136.9528 136.9528 136.9528 ZT8-11 112.270656 112.270656 112.270656 ZT12-15 102.330432 102.330432 102.330432 ZT16-19 71.439594 71.439594 71.439594 ZT20-23 71.4528935 71.4528935 71.4528935