condition mean min max ZT0-3 1664.6109999999999 1664.6109999999999 1664.6109999999999 ZT4-7 1800.307 1800.307 1800.307 ZT8-11 1769.318 1769.318 1769.318 ZT12-15 1446.597 1446.597 1446.597 ZT16-19 2608.089 2608.089 2608.089 ZT20-23 2362.0936666666666 2362.0936666666666 2362.0936666666666