condition mean min max ZT0-3 10.386145 10.386145 10.386145 ZT4-7 10.882842499999999 10.882842499999999 10.882842499999999 ZT8-11 10.545481500000001 10.545481500000001 10.545481500000001 ZT12-15 9.1832595 9.1832595 9.1832595 ZT16-19 11.009320500000001 11.009320500000001 11.009320500000001 ZT20-23 10.6761445 10.6761445 10.6761445