condition mean min max ZT0-3 61.22722653833333 56.223623520000004 66.23082955666666 ZT4-7 75.43696215 71.59336653999999 79.28055776 ZT8-11 79.766907155 78.75187984666667 80.78193446333333 ZT12-15 83.04738946333333 76.69001644666666 89.40476248 ZT16-19 75.94402608833333 73.80212062 78.08593155666667 ZT20-23 67.870854535 67.2072405 68.53446857