# [LON-CAPA-admin] problem with randomized exam grading

H. K. Ng hkng at fsu.edu
Tue Sep 25 14:40:15 EDT 2007

```Hi,

One of the professors randomized exam problem does not seem to grade
properly. The question contains two parts but one of the parts has a
numerical response and an option response problem. It seems the
numerical response part is not graded.

The problem is located at
fsu/GeneralPhysics/2048_Fall07_Miniexams/Miniquiz3_Sept20/boy_girl_on_ice.problem

However, I have attached the problem below since it was published
under domain only. Part id=b is not graded correctly.

Thanks,
-hk

<problem>
<import id="11">../../Tools/ultility.library</import>

<script type="loncapa/perl">
\$mass_g = &random(31,40,2);
\$mass_b = \$mass_g*2;
\$force = &random(110,150,2);
\$acc_b = \$force/\$mass_b;
push @w1,\$acc_b/2,\$acc_b*2,\$acc_b*2/3;
push @w_ans1, at w1;
</script>

<startouttext />A boy of mass m<sub>1</sub> = \$mass_b kg and a girl
of mass m<sub>2</sub> = \$mass_g kg face each other on a very slippery
frozen lake, each holding the same piece of rope. The boy pulls on
the rope with a horizontal force F = \$force N.<endouttext />
<part id="a">
<optionresponse max="10" id="12" randomize="yes" TeXlayout="horizontal">
<foilgroup options="('a third of','half of','equal
to','twice','three times','unrelated to')">
<conceptgroup concept="T_and_F">
<foil location="random" value="equal to" name="sa1">
<startouttext />The magnitude of the tension T in the rope is
<drawoptionlist /> that of the force F.<endouttext />
</foil>
<foil location="random" value="equal to" name="sa2">
<startouttext />The magnitude of the force F is <drawoptionlist />
that of the tension T in the rope.<endouttext />
</foil>
</conceptgroup>

<conceptgroup concept="MagF">
<foil location="random" value="equal to" name="sb1">
<startouttext />The magnitude of the force exerted <b>on</b> the boy
<b>by</b> the rope is <drawoptionlist /> that of the force F.<endouttext />
</foil>
</conceptgroup>

<conceptgroup concept="magA">
<foil location="random" value="twice" name="sc1">
<startouttext />The magnitude of the acceleration of the girl is
<drawoptionlist /> that of the acceleration of the boy.<endouttext />
</foil>
<foil location="random" value="half of" name="sc2">
<startouttext />The magnitude of the acceleration of the boy is
<drawoptionlist /> that of the acceleration of the girl.<endouttext />
</foil>
</conceptgroup>
</foilgroup>
</optionresponse>
</part>

<part id="b"><tex>\vskip 10pt</tex>
<startouttext />The boy's acceleration is
<endouttext />
<br />
<numericalresponse unit="m/s^2" format="3s" answer="\$acc_b" id="15"
incorrect="@w_ans1">
<responseparam name="sig" type="int_range,0-12"
default="3,5" description="Significant Figures" />
<responseparam name="tol" type="tolerance" default="1%"
description="Numerical Tolerance" />
<textline readonly="no" size="12" />
</numericalresponse>

<optionresponse max="10" id="16" randomize="yes" TeXlayout="horizontal">
<foilgroup options="('closer to the boys starting point','closer
to the girls starting point','half way between their starting points')">
<conceptgroup concept="T_and_F">
<foil location="random" value="closer to the boys starting point" name="s1">
<startouttext />When they meet, they are<drawoptionlist /><endouttext />
</foil>
</conceptgroup>
</foilgroup>
</optionresponse>
</part>
</problem>

```