condition mean min max ZT0-3 9.9166051075 5.651259606 14.181950609 ZT4-7 55.3745037825 41.986018015 68.76298955 ZT8-11 92.5496332125 77.524590775 107.57467565 ZT12-15 104.1606430025 98.208851505 110.1124345 ZT16-19 39.97242973749999 32.895266285 47.049593189999996 ZT20-23 24.22514383 20.030237415000002 28.420050245