condition mean min max ZT0-3 26.649923422500002 25.90101932 27.398827525 ZT4-7 23.37699055 21.07005606 25.68392504 ZT8-11 34.5965955225 29.22988877 39.963302275000004 ZT12-15 25.2891715375 21.015179335 29.56316374 ZT16-19 17.72523108 16.21550136 19.2349608 ZT20-23 19.793149092500002 18.591852175 20.99444601