condition mean min max ZT0-3 1.4326150000000002 1.1244100000000001 1.7408200000000003 ZT4-7 0.9196325000000001 0.9196325000000001 0.9196325000000001 ZT8-11 1.82839 1.82839 1.82839 ZT12-15 0 0 0 ZT16-19 1.8067775 1.8067775 1.8067775 ZT20-23 1.598635 1.598635 1.598635