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    1: \label{Statistics_Key}
    2: 
    3: The \textbf{Overall Problem Statistics} page displays the following 
    4: data about the problems currently in the course:
    5: 
    6: \begin{itemize}
    7: 
    8: \item \textbf{#Stdnts}
    9: Total number of students attempting the problem.
   10: 
   11: \item \textbf{Tries}
   12: Total number of attempts to solve the problem.
   13: 
   14: \item \textbf{Max Tries}
   15: Largest number of to solve the problem by a student.
   16: 
   17: \item \textbf{Mean Tries}
   18: Average number of tries.
   19: 
   20: \item \textbf{S.D. tries}
   21: Standard Deviation of the tries.
   22: 
   23: \item \textbf{Skew Tries}
   24: Skewness of the students tries.
   25: \[\frac{\sqrt{ \sum{(Xi - Mean)^3} / #Stdnts}}{\sigma^3}\]
   26: 
   27: \item \textbf{DoDiff}
   28: Degree of Difficulty of the problem.  
   29: \[ 1 - \frac{\#YES+\#yes}{Tries} \]
   30: 
   31: \item \textbf{#YES}
   32: Number of students who solved the problem correctly.
   33: 
   34: \item \textbf{#yes}
   35: Number of students who solved the problem by override.
   36: 
   37: \item \textbf{\%Wrng}
   38: Percentage of students who tried to solve the problem but were unable to.
   39: 
   40: 
   41: \end{itemize}