In this paper, we describe and contrast these approaches, and discuss several issues associated with futility analyses, such as ethical considerations, whether or not type I error can or should be reclaimed, one-sided vs two-sided futility rules, and the impact of futility analyses on power.
You can open an AutoCAD DWG or DXF file for review, and then add your comments. For example, you might want to review and annotate a CAD drawing and then return it to the person who created it. On the File menu, click Open. Under Files of type, click AutoCAD Drawing.
1 Adobe After Effects can open and use .ai files for video editing. 2  Cinema 4D can import .ai files for conversion to 3D images or for basic editing. 3  CorelDRAW (proprietary program) can natively edit this file format with some limitations. 4  Corel Paint Shop Pro (proprietary program) can natively edit this file format.