condition mean min max ZT0-3 11.00968 10.32316 11.696200000000001 ZT4-7 8.229244999999999 8.229244999999999 8.229244999999999 ZT8-11 11.623750000000001 11.623750000000001 11.623750000000001 ZT12-15 0 0 0 ZT16-19 13.8008 13.8008 13.8008 ZT20-23 11.525500000000001 11.525500000000001 11.525500000000001