condition mean min max ZT0-3 130.9805 130.9805 130.9805 ZT4-7 68.65965 68.65965 68.65965 ZT8-11 249.0105 249.0105 249.0105 ZT12-15 416.315 416.315 416.315 ZT16-19 358.72400000000005 358.72400000000005 358.72400000000005 ZT20-23 209.3005 209.3005 209.3005