condition mean min max ZT0-3 2865.757481 2865.757481 2865.757481 ZT4-7 2119.811104 2119.811104 2119.811104 ZT8-11 1264.6314145000001 1264.6314145000001 1264.6314145000001 ZT12-15 1210.051592 1210.051592 1210.051592 ZT16-19 953.2685775 953.2685775 953.2685775 ZT20-23 1632.094346 1632.094346 1632.094346