condition mean min max ZT0-3 10.316955 10.230509999999999 10.4034 ZT4-7 4.997325 4.997325 4.997325 ZT8-11 13.912749999999999 13.912749999999999 13.912749999999999 ZT12-15 0 0 0 ZT16-19 13.7943 13.7943 13.7943 ZT20-23 9.452635 9.452635 9.452635