condition mean min max ZT0-3 5068.450000000001 5068.450000000001 5068.450000000001 ZT4-7 7070.7 7070.7 7070.7 ZT8-11 6577.049999999999 6577.049999999999 6577.049999999999 ZT12-15 6547.35 6547.35 6547.35 ZT16-19 6184.85 6184.85 6184.85 ZT20-23 6058.2 6058.2 6058.2