condition mean min max ZT0-3 14.8304954525 12.550459755 17.11053115 ZT4-7 13.887078642666667 12.416403431 15.357753854333334 ZT8-11 14.225854827833334 10.948983435666667 17.50272622 ZT12-15 10.594335207 9.972456045000001 11.216214369 ZT16-19 15.088751827500001 12.724395728333333 17.453107926666668 ZT20-23 21.791686419999998 19.75922197 23.82415087