Hi everyone,
I have a quiz problem in LC that seems to be doing some odd things with the
rounding. I have successfully recreated the problem reported by one of my
students, but cannot figure out why it happens.
The answer to the problem (part c) is 2.65 on the dot. The problem requests an
answer with one place after the decimal, and the tolerance is +/- 0.05. In this
case, since the value computes to exactly 2.65, LC should take anything from
2.6 to 2.7. In fact, in author view LC indicates it will take anything from 2.6
to 2.7:
[cid:image002.jpg@01D570BD.B3DBBD30]
The trouble is that 2.6 works, 2.65 works, but 2.7 does not.
This is the Perl script calculation (Rf=33, Ri=20):
$Av = 1+$Rf/$Ri; # Gain
This is the response code:
<numericalresponse unit="" format="1f" answer="$Av" id="3">
<responseparam name="tol" type="tolerance" default="0.05"
description="Numerical Tolerance" />
<textline readonly="no" spellcheck="none" />
</numericalresponse>
Any idea what the problem is? I am baffled.
Best regards,
Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/
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