condition mean min max ZT0-3 237.75 237.75 237.75 ZT4-7 214.7 214.7 214.7 ZT8-11 231.14999999999998 231.14999999999998 231.14999999999998 ZT12-15 221.75 221.75 221.75 ZT16-19 289.95 289.95 289.95 ZT20-23 296.7 296.7 296.7