condition mean min max ZT0-3 53.78835 53.78835 53.78835 ZT4-7 44.99085 44.99085 44.99085 ZT8-11 56.919200000000004 56.919200000000004 56.919200000000004 ZT12-15 60.0683 60.0683 60.0683 ZT16-19 68.87415 68.87415 68.87415 ZT20-23 49.9423 49.9423 49.9423