search for: pv1math

...ince the data set provided by the OECD already contains variables with plausible values. Roughly, the situation is like this: for each of the cognitive (achievement) scales, there are five variables holding plausible values. So for example, there is not one variable for math achievement, but five, pv1math through pv5math. There are, of course, no missing values on these variables. Most other variables show some degree of missing data. For example, some students did not report their parents' occupation, so there is no information about the socio-economic background (HISEI). This is the kind of d...