condition mean min max ZT0-3 10.361811666666666 7.240365000000001 14.50925 ZT4-7 12.38675 12.38675 12.38675 ZT8-11 9.35763 9.35763 9.35763 ZT12-15 11.7133675 11.70985 11.716885 ZT16-19 7.630015 7.630015 7.630015 ZT20-23 9.923655 9.923655 9.923655