Testing directional hypotheses: p-values can bite

I’ve recently had interesting discussions with colleagues in Information Systems regarding testing directional hypotheses. Following their request, I’m posting about this apparently illusive issue. In information systems research, the most common type of hypothesis is directional, i.e. the parameter of interest is hypothesized to go in a certain direction. An example would be testing the hypothesis that teenagers are more likely than older folks to use Facebook. Another example is the hypothesis that higher opening bids on eBay lead to higher final prices. In the Facebook example, the researcher would test the hypothesis by gathering data on Facebook usage by … Continue reading Testing directional hypotheses: p-values can bite

SAS On Demand: Enterprise Miner — Update

Following up on my previous posting about using SAS Enterprise Minder via the On Demand platform: From continued communication with experts at SAS, it turns out that with the EM version 5.3, which is the one available through On Demand, there is no way to work (or even access) non-SAS files. Their suggestion solution is to use some other SAS product like SAS BASE, or even SAS JMP (which is available through the On Demand platform) in order to convert your CSV files to SAS data files… From both a pedagogical and practical point of view, I am reluctant to … Continue reading SAS On Demand: Enterprise Miner — Update

SAS On Demand: Enterprise Miner

I am in the process of trying out SAS Enterprise Miner via the (relatively new) SAS On Demand for Academics. In our MBA data mining course at Smith, we introduce SAS EM. In the early days, we’d get individual student licenses and have each student install the software on their computer. However, the software took too much space and it was also very awkward to circulate a packet of CDs between multiple students. We then moved to the Server option, where SAS EM is available on the Smith School portal. Although it solved the individual installation and storage issues, the … Continue reading SAS On Demand: Enterprise Miner