condition mean min max ZT0-3 110.69999999999999 110.69999999999999 110.69999999999999 ZT4-7 145.6 145.6 145.6 ZT8-11 81.2 81.2 81.2 ZT12-15 94.30000000000001 94.30000000000001 94.30000000000001 ZT16-19 122.95 122.95 122.95 ZT20-23 97.85 97.85 97.85