condition mean min max ZT0-3 102.194856 102.194856 102.194856 ZT4-7 106.939781 106.939781 106.939781 ZT8-11 106.3478755 106.3478755 106.3478755 ZT12-15 98.974425 98.974425 98.974425 ZT16-19 160.1234325 160.1234325 160.1234325 ZT20-23 165.8915355 165.8915355 165.8915355