[LON-CAPA-users] Tolerances with Hints

[Lucas, Mark]

Hi,

I am looking to include a hint in a problem that occurs if a response is inside a wider
tolerance (5%) but not within the requested tolerance (1%).

I created the following hint code and plugged this into a course to test it.
When I look at the parameters for the problem, the tolerance for id=“11” shows
5% (the tolerance used in the numericalhint tags), not 1%. I found this out
when I purposely entered an answer that was about 3% off and found that I got
it right.

I thought I had done something like this before, but may not have
tested it as rigorously as I thought (or I just may be deluding myself that I’ve
done this before).

Has anyone else tried this before? Is this a feature or a bug?

Thanks!
Mark


    <numericalresponse unit="J" format="3s" answer="$W" id="11">
      <responseparam name="tol" type="tolerance" default="1%" description="Numerical Tolerance" />
      <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
      <textline />
    <hintgroup showoncorrect="no">
      <numericalhint unit="J" format="3s" answer="$dEPE" name="wrongSign" id="12">
        <responseparam name="tol" type="tolerance" default="5%" description="Numerical Tolerance" />
        <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
      </numericalhint>
      <numericalhint unit="J" format="3s" answer="$W" name="Tol" id="14">
        <responseparam name="tol" type="tolerance" default="5%" description="Numerical Tolerance" />
        <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
      </numericalhint>
      <hintpart on="wrongSign">
        <startouttext />Remember that this is the work done BY the electric field, not the work done by you.<endouttext />
      </hintpart>
      <hintpart on="Tol">
        <startouttext />In this calculation you are adding a number of different terms, some of which are
          positive and some of which are negative. 
          There is some benefit to working this problem out algebraically and finding terms that
          might offset each other. Remember that your answer needs to be within a tolerance of about
          $Tolerance.<endouttext />
      </hintpart>
    </hintgroup>
</numericalresponse>



-- 
Mark Lucas 								email: lucasm at ohiou.edu
252D Clippinger Lab						phone: (740)597-2984
Department of Physics and Astronomy			fax: (740)593-0433
Ohio University
Athens, OH 45701