condition mean min max ZT0-3 4287.225232 4287.225232 4287.225232 ZT4-7 3540.4107235 3540.4107235 3540.4107235 ZT8-11 2293.1444899999997 2293.1444899999997 2293.1444899999997 ZT12-15 3123.962826 3123.962826 3123.962826 ZT16-19 2619.874385 2619.874385 2619.874385 ZT20-23 2183.887363 2183.887363 2183.887363