\label{Statistics_Key}
The \textbf{Overall Problem Statistics} page displays the following
data about the problems currently in the course:
\begin{itemize}
\item \textbf{\#Stdnts}
Total number of students attempting the problem.
\item \textbf{Tries}
Total number of attempts to solve the problem.
\item \textbf{Max Tries}
Largest number of to solve the problem by a student.
\item \textbf{Mean Tries}
Average number of tries.
\item \textbf{S.D. tries}
Standard Deviation of the tries.
\item \textbf{Skew Tries}
Skewness of the students tries.
\[\frac{\sqrt{ \sum{(Xi - Mean)^3} / \#Stdnts}}{\sigma^3}\]
\item \textbf{\#YES}
Number of students who solved the problem correctly.
\item \textbf{\#yes}
Number of students who solved the problem by override.
\item \textbf{\%Wrng}
Percentage of students who tried to solve the problem but were unable to.
\item \textbf{DoDiff}
Degree of Difficulty of the problem.
\[ 1 - \frac{\#YES+\#yes}{Tries} \]
\item \textbf{DoDisc}
Degree of Discrimination of the problem.
The students are grouped based on their scores on the sequence which
contains the homework problem. The percent score of the bottom 25\% of
the students is subtracted from the percent score the to top 25\% of
the students. This yields a number from -1 to 1. 1.0 indicates
all of the good students answered the problem correctly and none of the
poor students answered it correctly. Conversely, a score of -1.0 indicates
all of the good students got the problem wrong and the bad students did
well.
\end{itemize}
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