condition mean min max ZT0-3 196.89999999999998 196.89999999999998 196.89999999999998 ZT4-7 198.9 198.9 198.9 ZT8-11 173.55 173.55 173.55 ZT12-15 264.55 264.55 264.55 ZT16-19 209.75 209.75 209.75 ZT20-23 214.5 214.5 214.5