condition mean min max ZT0-3 3039.311035 3039.311035 3039.311035 ZT4-7 2788.5891094999997 2788.5891094999997 2788.5891094999997 ZT8-11 2668.234469 2668.234469 2668.234469 ZT12-15 3483.3742125 3483.3742125 3483.3742125 ZT16-19 3084.733094 3084.733094 3084.733094 ZT20-23 3341.3985734999997 3341.3985734999997 3341.3985734999997