condition mean min max ZT0-3 0.15227366666666667 0.057251 0.341832 ZT4-7 0.105147 0.105147 0.105147 ZT8-11 0.7733475 0.7733475 0.7733475 ZT12-15 0.86546875 0.7563545 0.974583 ZT16-19 0.265544 0.265544 0.265544 ZT20-23 0.40937799999999996 0.40937799999999996 0.40937799999999996