condition mean min max ZT0-3 122.662804 122.662804 122.662804 ZT4-7 132.6139925 132.6139925 132.6139925 ZT8-11 129.44445050000002 129.44445050000002 129.44445050000002 ZT12-15 131.884745 131.884745 131.884745 ZT16-19 172.8786965 172.8786965 172.8786965 ZT20-23 153.960015 153.960015 153.960015