## R exam

**I** spent most of my Saturday perusing R codes to check the answers written by my students to the R exam I gave two weeks ago… The outcome is mostly poor, even though some managed to solve a fair part of the long problem. Except for the few hopeless cases who visibly never wrote a single line of R code before the exam, all students have managed the basics of R programming and graphics, if not of Monte Carlo approximations or of boostrapping. One of the problems involved the distribution of a disk area and I found that half of the [third year math!] students do not know the formula! Although I had repeatedly told them about the good training in trying to solve Le Monde puzzles (as well as checking my posts about them), only one student found the solution to puzzle #49…

March 28, 2011 at 12:21 am

[...] what seems like an endless cuRse, I found this week I had to re-grade a dozen R exams a TA’s did not grade properly! The grades I (X) got are plotted below against those of my TA [...]

January 30, 2011 at 2:54 pm

disk area ? what about the area of a triangle ?

http://enerve-de-service.hautetfort.com/archive/2009/03/04/aire-d-un-triangle.html

http://enerve-de-service.hautetfort.com/archive/2009/03/12/aire-d-un-triangle.html

http://enerve-de-service.hautetfort.com/archive/2009/03/21/aire-d-un-triangle-3.html