Two days ago, I was teaching correlation & regression to my students and a few of the are rather puzzled why the r-value is independent of any translation and scaling. Let us first look at [...]
A few days ago, I met up with some ex-students from class of 2014 who are awaiting their universities to start, for coffee. It was really heartwarming to see them, a couple of them are teaching [...]
Many students have asked me about Mathematical Induction, like whats the idea behind it. Especially since I always emphasize the importance of . So lets try to make some sense of this long and [...]
If KS travels half the distance to the bus stop for every move, will he ever reach the bus stop? The answer is that I will never reach the bus stop, but could make arbitrarily close to it. This [...]
Many students asked me what exactly is r-value. They are always confused with the idea of correlation and causation. If you’re still confused, let me first establish that r-value implies [...]
[ted id=1007] I want to share this video with students to highlight the importance of learning computing today. Many A-level students do not realise, but their peers in universities (especially [...]
Many students memorise the standard answer, that is, when the estimated data is not within range, we are extrapolating so it is not reliable. But why is it unreliable! Consider an example of [...]
The midyears for many JC have ended and most of my students got their papers back. I notice a handful do not follow instructions very clearly. The instructions to candidates always state clearly [...]
In 2013 A-level Paper 2 , many students made an unfortunate mistake. The following is an snapshot of questions 2 of the paper. Many students faced the dilemma of what to prove, and some resorted [...]
One of the confusing thing that many JC2s stumble upon is that variances in A-levels. This is partly attributed to the lack of understanding and introduction of the concept. By hypothesis [...]
