condition mean min max ZT0-3 142.026278 142.026278 142.026278 ZT4-7 195.078211 195.078211 195.078211 ZT8-11 186.12703 186.12703 186.12703 ZT12-15 204.34912200000002 204.34912200000002 204.34912200000002 ZT16-19 202.8004305 202.8004305 202.8004305 ZT20-23 198.221971 198.221971 198.221971