condition mean min max ZT0-3 56.382925 55.199200000000005 57.56665 ZT4-7 61.275949999999995 61.275949999999995 61.275949999999995 ZT8-11 36.1772 36.1772 36.1772 ZT12-15 0 0 0 ZT16-19 26.61775 26.61775 26.61775 ZT20-23 49.16215 49.16215 49.16215