[ww-bugs] Bug 4085: New: introduce tolerance for chart users

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=4085

           Summary: introduce tolerance for chart users
           Product: Problem Libraries
           Version: unspecified
          Platform: PC
               URL: /opt/webwork/courses/MATH2441/templates/Library/NAU/se
                    tStatistics/normprob4.pg_with_problemSeed=1234
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Library (OPL)
        AssignedTo: gjennings at csudh.edu
        ReportedBy: wub7quxa at gmail.com
        Web browser Firefox
           version:


Many students use charts or tables for the normal distribution rather
than software. In the interest of accommodating these students, I
would change line 49

ANS(num_cmp($sig));

to 

ANS(num_cmp($sig,
  tolType => 'absolute',
    tolerance => .01,
    ));

I tested this revision, and it works. Many other WeBWorK questions in
statistics use tolerance so that students who use a table don't get
marked with an ``incorrect.''

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