condition mean min max ZT0-3 9.569518333333335 7.955055 11.233250000000002 ZT4-7 10.522884999999999 10.522884999999999 10.522884999999999 ZT8-11 10.9049 10.9049 10.9049 ZT12-15 13.2604 12.06175 14.45905 ZT16-19 11.149450000000002 11.149450000000002 11.149450000000002 ZT20-23 11.581050000000001 11.581050000000001 11.581050000000001