condition mean min max ZT0-3 9.85227 9.335550000000001 10.36899 ZT4-7 7.0057100000000005 7.0057100000000005 7.0057100000000005 ZT8-11 7.06008 7.06008 7.06008 ZT12-15 0 0 0 ZT16-19 9.137035000000001 9.137035000000001 9.137035000000001 ZT20-23 7.9202200000000005 7.9202200000000005 7.9202200000000005