condition mean min max ZT0-3 185.020035 185.020035 185.020035 ZT4-7 216.843965 216.843965 216.843965 ZT8-11 182.80974750000001 182.80974750000001 182.80974750000001 ZT12-15 213.51782300000002 213.51782300000002 213.51782300000002 ZT16-19 225.69359500000002 225.69359500000002 225.69359500000002 ZT20-23 249.2071625 249.2071625 249.2071625