condition mean min max ZT0-3 53.474461 53.474461 53.474461 ZT4-7 100.12107599999999 100.12107599999999 100.12107599999999 ZT8-11 123.57786000000002 123.57786000000002 123.57786000000002 ZT12-15 88.39010049999999 88.39010049999999 88.39010049999999 ZT16-19 75.143483 75.143483 75.143483 ZT20-23 60.923784 60.923784 60.923784