• Marc Schnydrig

• Part 1
• Part 2
• Part 3

• There are two main files
  • src/randomize.pl creates the empty exam file from a master file (Part 1a)
  • src/score.pl
    • compares student exams with the master exam and scores the student exams (Part 1b)
    • reports missing questions and missing or misspelled answers (Part 2)
    • prints out the statistics from src/Modules/Statistics (Part 3)
• And there are several modules with many subroutines:
  • src/Modules/Create_Exam creates a new exam file with randomized answers
  • src/Modules/Exam_Parser parses the entire exam using the grammars module
  • src/Modules/Statistics provides subroutines used for statistics (part 3)
  • src/Modules/Useful_Subs provides useful subroutines used in the entire project

• Data::Show - to show content of variables such as hashes
• Cwd - get pathname of current working directory
• File::Spec - portably perform operations on file names
• Time::Moment - represents a date and time of day with an offset from UTC
• File::Basename - parse file paths into directory, filename and suffix
• Lingua::StopWords - stop words for several languages
• Text::Levenshtein::Damerau - Damerau Levenshtein edit distance
• Color::Output - to give color to the output
• POSIX - several mathematical functions
• Regexp::Grammars - grammatical parsing features
• Statistics::Basic::Stddev - calculate standard deviation
• List::Util - to shuffle a list

• Criteria 1: only show students with a score less than 50% (score < 50%)
• Criteria 2: only show students who answered less than 25% of the entire exam (answered questions < 25%)
• Criteria 3: only show students who are more than one standard deviation below the average score

• To run the scripts, perl v5.3.2 must be installed
• Also the above-mentioned CPAN-modules must be installed
• Then the line use lib '...'; has to be replaced with your current lib-directory (probably just use lib 'lib'; should work) in both files src/randomize.pl and src/score.pl !
• And now you can run either:
  • perl src/randomize.pl <path_of_master_file> to create a new empty exam file with randomized answers
  • or:
  • perl src/score.pl <path_of_master_file> <paths_of_student_files> to score the student files, print out missing questions and answers, and see the statistics

The file src/score.pl is not working correctly (part 1b/2). More specifically, the checking of missing or incorrect answers does not work quite precisely. The problem lies in sorting the answers: in the case of incorrect answers, the wrong answers are sometimes compared with each other after sorting them alphabetically. By the time I realized this it was too late to adjust anything, so I left it as is and tried to improve it a little more.