If a student has ability \(a\), and a probably is \(d\) difficulty, the probability of a student getting something right:
\begin{equation} \sigma (a-d) \end{equation}
this doesn’t consider SLIPPING at all.
If a student has ability \(a\), and a probably is \(d\) difficulty, the probability of a student getting something right:
\begin{equation} \sigma (a-d) \end{equation}
this doesn’t consider SLIPPING at all.