condition mean min max ZT0-3 62.594274999999996 61.53035 63.6582 ZT4-7 73.074 73.074 73.074 ZT8-11 105.526 105.526 105.526 ZT12-15 0 0 0 ZT16-19 75.49940000000001 75.49940000000001 75.49940000000001 ZT20-23 48.89805 48.89805 48.89805