condition mean min max ZT0-3 9.83319 9.83319 9.83319 ZT4-7 8.004114999999999 8.004114999999999 8.004114999999999 ZT8-11 15.5602 15.5602 15.5602 ZT12-15 14.4393 14.4393 14.4393 ZT16-19 18.190399999999997 18.190399999999997 18.190399999999997 ZT20-23 10.73095 10.73095 10.73095