condition mean min max ZT0-3 1038.2 1038.2 1038.2 ZT4-7 911.8 911.8 911.8 ZT8-11 968.05 968.05 968.05 ZT12-15 886.15 886.15 886.15 ZT16-19 1032.3000000000002 1032.3000000000002 1032.3000000000002 ZT20-23 1031.9 1031.9 1031.9