condition mean min max ZT0-3 4.4218825 4.05071 4.793055 ZT4-7 4.01544 4.01544 4.01544 ZT8-11 3.45267 3.45267 3.45267 ZT12-15 0 0 0 ZT16-19 4.505105 4.505105 4.505105 ZT20-23 3.889925 3.889925 3.889925