condition mean min max ZT0-3 2183.997691 2183.997691 2183.997691 ZT4-7 2512.347472 2512.347472 2512.347472 ZT8-11 1280.9012255 1280.9012255 1280.9012255 ZT12-15 1207.1910175 1207.1910175 1207.1910175 ZT16-19 623.458134 623.458134 623.458134 ZT20-23 571.4269925 571.4269925 571.4269925