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sigma =
5.1128e-001
degree of polynomial = 2
coeff =
-4.1971e-002
2.1512e+000
-8.5701e+000
sigma =
3.1099e-001
degree of polynomial = 3
coeff =
-2.9852e-003
2.8845e-003
1.9810e+000
-8.4660e+000
sigma =
3.1948e-001
degree of polynomial =
Done
041971
x
2
5701produces the
smallest standard deviation, itcan beconsideredas the “best”fittothedata. But be
warned—the standarddeviationis not an infalliblemeasureofthegoodness-of-fit. It is
always agoodidea to plot the datapoints and
f
(
x
) before final determinationismade.
The plot of our data indicates that the quadratic (solid line) is indeedareasonable
choice for the fitting function.
Because
the
quadratic
f
(
x
)
=−
0
.
+
2
.
1512
x
−
8
.
10.0
5.0
0.0
-5.0
-10.0
-2.0
0.0
2.0
4.0
6.0
8.0
10.0
12.0
x
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