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:
10: Total number of students attempting the problem.
11:
12: \item \textbf{Tries}
13:
14: Total number of attempts to solve the problem.
15:
16: \item \textbf{Max Tries}
17:
18: Largest number of to solve the problem by a student.
19:
20: \item \textbf{Mean Tries}
21:
22: Average number of tries.
23:
24: \item \textbf{S.D. tries}
25:
26: Standard Deviation of the tries.
27:
28: \item \textbf{Skew Tries}
29:
30: Skewness of the students tries.
31: \[\frac{\sqrt{ \sum{(Xi - Mean)^3} / #Stdnts}}{\sigma^3}\]
32:
33: \item \textbf{#YES}
34:
35: Number of students who solved the problem correctly.
36:
37: \item \textbf{#yes}
38:
39: Number of students who solved the problem by override.
40:
41: \item \textbf{\%Wrng}
42:
43: Percentage of students who tried to solve the problem but were unable to.
44:
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.
62:
63: \end{itemize}
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