condition mean min max ZT0-3 9.72815 9.038450000000001 10.41785 ZT4-7 8.478705 8.478705 8.478705 ZT8-11 5.9315750000000005 5.9315750000000005 5.9315750000000005 ZT12-15 0 0 0 ZT16-19 10.143930000000001 10.143930000000001 10.143930000000001 ZT20-23 10.365324999999999 10.365324999999999 10.365324999999999