Compare slopes
 From: biplabbose@xxxxxxxxx
 Date: 22 Sep 2005 12:17:47 0700
We have two experimental data sets. Both of them have same independent
variable (X) and dependent variable (Y). For each value of X, we have
triplicate of Y data in each data set. We Plotted these data and fitted
to an equation Y = mX + 1 using MS Excel.
So we have got two linear equations fro these two data sets. Now we
want to compare the slopes of these two straight lines.
Our question: Are there any statistically significant difference
between these two slopes? Can you please let us know how to calculate
it? I am giving the data bellow:
First data set:
X Y
0.1  0.66 0.68 0.67
0.2  0.63 0.62 0.63
0.5  0.48 0.47 0.47
1.0  0.4 0.37 0.35
Second data set
X Y
0.1  0.38 0.39 0.38
0.2  0.33 0.34 0.37
0.5 0.32 0.31 0.33
1.0  0.24 0.24 0.25
With regards
Biplab
.
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