[LON-CAPA-cvs] cvs: loncom /html/adm/help/tex Tolerance.tex

[albertel]

albertel		Thu May 29 16:30:51 2003 EDT

  Modified files:              
    /loncom/html/adm/help/tex	Tolerance.tex 
  Log:
  - Fixes Bug #1313
  
  
Index: loncom/html/adm/help/tex/Tolerance.tex
diff -u loncom/html/adm/help/tex/Tolerance.tex:1.2 loncom/html/adm/help/tex/Tolerance.tex:1.3
--- loncom/html/adm/help/tex/Tolerance.tex:1.2	Thu Jul 18 11:52:27 2002
+++ loncom/html/adm/help/tex/Tolerance.tex	Thu May 29 16:30:51 2003
@@ -15,17 +15,25 @@
 default too large for some problems. 
 
 There are
-two kinds of tolerance. For some answer $a$ and a tolerance $t$,
+three kinds of tolerance. For some answer $A$ and a tolerance $T$,
 
 \begin{enumerate}
 \item an \textbf{Absolute} tolerance\index{absolute tolerance}\index{tolerance, absolute}
-will take anything in the range $a\pm t$. So if $a=10$ and $t=2$, then
+will take anything in the range $A\pm T$. So if $A=10$ and $T=2$, then
 anything between 8 and 12 is acceptable.
  Any number in the tolerance field \emph{without} a \textbf{\%} symbol is
 an absolute tolerance.
 \item a \textbf{Relative} tolerance\index{relative tolerance}\index{tolerance, relative}
-will take anything in the range $a\pm at$, where \emph{t} is interpreted
-as a percentage. Any number in the tolerance field \emph{followed by} a \textbf{\%}
+will take anything in the range $A\pm aT$, where \emph{T} is interpreted
+as a percentage/100. Any number in the tolerance field \emph{followed by} a \textbf{\%}
 symbol is a relative tolerance. For example, $a=10$ and $t=10\%$ will accept
 anything between 9 and 11. 
-\end{enumerate}
\ No newline at end of file
+
+\item a tolerance that is a calculated variable (identified by \$ sign as
+the first character). For example, if an answer is $\$X$,and for a student
+possible values range from $-\$X1$ to $+\$X1$, you could choose $T =
+\$tolerance = \$2X1/100;$ acceptable answers would then be from
+$\$X-\$tolerance$ to $\$X+\$tolerance$. (This is especially useful when answers
+close to zero are possible for some students)
+
+\end{enumerate}