condition mean min max ZT0-3 68.01166748166668 57.97751416 78.04582080333334 ZT4-7 90.61829730166667 84.58433822666667 96.65225637666667 ZT8-11 68.704196845 63.1041717 74.30422199 ZT12-15 76.591144175 68.05586283 85.12642552 ZT16-19 71.71937186166667 70.97351972666667 72.46522399666667 ZT20-23 76.39701790666668 74.64170437333334 78.15233144000001