condition mean min max ZT0-3 99.112494 99.112494 99.112494 ZT4-7 149.0405905 149.0405905 149.0405905 ZT8-11 121.71069800000001 121.71069800000001 121.71069800000001 ZT12-15 188.992872 188.992872 188.992872 ZT16-19 126.88154399999999 126.88154399999999 126.88154399999999 ZT20-23 184.96768550000002 184.96768550000002 184.96768550000002