Annotation of loncom/html/adm/help/tex/Statistics_Overall_Key.tex, revision 1.3
1.1 matthew 1: \label{Statistics_Key}
2:
1.2 www 3: The \textbf{Overall Problem Statistics} page displays the following
1.1 matthew 4: data about the problems currently in the course:
5:
6: \begin{itemize}
7:
8: \item \textbf{#Stdnts}
1.3 ! matthew 9:
1.1 matthew 10: Total number of students attempting the problem.
11:
12: \item \textbf{Tries}
1.3 ! matthew 13:
1.1 matthew 14: Total number of attempts to solve the problem.
15:
16: \item \textbf{Max Tries}
1.3 ! matthew 17:
1.1 matthew 18: Largest number of to solve the problem by a student.
19:
20: \item \textbf{Mean Tries}
1.3 ! matthew 21:
1.1 matthew 22: Average number of tries.
23:
24: \item \textbf{S.D. tries}
1.3 ! matthew 25:
1.1 matthew 26: Standard Deviation of the tries.
27:
28: \item \textbf{Skew Tries}
1.3 ! matthew 29:
1.1 matthew 30: Skewness of the students tries.
31: \[\frac{\sqrt{ \sum{(Xi - Mean)^3} / #Stdnts}}{\sigma^3}\]
32:
1.3 ! matthew 33: \item \textbf{#YES}
1.1 matthew 34:
35: Number of students who solved the problem correctly.
36:
37: \item \textbf{#yes}
1.3 ! matthew 38:
1.1 matthew 39: Number of students who solved the problem by override.
40:
41: \item \textbf{\%Wrng}
1.3 ! matthew 42:
1.1 matthew 43: Percentage of students who tried to solve the problem but were unable to.
44:
1.3 ! matthew 45: \item \textbf{DoDiff}
! 46:
! 47: Degree of Difficulty of the problem.
! 48: \[ 1 - \frac{\#YES+\#yes}{Tries} \]
! 49:
! 50: \item \textbf{DoDisc}
! 51:
! 52: Degree of Discrimination of the problem.
! 53:
! 54: The students are grouped based on their scores on the sequence which
! 55: contains the homework problem. The percent score of the bottom 25\% of
! 56: the students is subtracted from the percent score the to top 25\% of
! 57: the students. This yields a number from -1 to 1. 1.0 indicates
! 58: all of the good students answered the problem correctly and none of the
! 59: poor students answered it correctly. Conversely, a score of -1.0 indicates
! 60: all of the good students got the problem wrong and the bad students did
! 61: well.
1.1 matthew 62:
63: \end{itemize}
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