condition mean min max ZT0-3 53.569700000000005 19.70215 87.43725 ZT4-7 25.0392 25.0392 25.0392 ZT8-11 70.9577 70.9577 70.9577 ZT12-15 0 0 0 ZT16-19 61.63335 61.63335 61.63335 ZT20-23 77.01804999999999 77.01804999999999 77.01804999999999