condition mean min max ZT0-3 12.736548 12.736548 12.736548 ZT4-7 12.863366 12.863366 12.863366 ZT8-11 11.607596000000001 11.607596000000001 11.607596000000001 ZT12-15 12.353052 12.353052 12.353052 ZT16-19 11.4896925 11.4896925 11.4896925 ZT20-23 13.589672499999999 13.589672499999999 13.589672499999999