Question: Consider the following sample data: y 5 1 3 x 5 1 3 a. Construct a scatterplot for the data. b. It is possible to

Consider the following sample data:

y 5 1 3 x 5 1 3

a. Construct a scatterplot for the data.

b. It is possible to find many lines for which

1y - yn2 = 0. For this reason, the criterion

1y - yn2 = 0 is not used to identify the “best-fitting”

straight line. Find two lines that have 1y - yn2 = 0.

c. Find the least squares line.

d. Compare the value of SSE for the least squares line with that of the two lines you found in part

b. What principle of least squares is demonstrated by this comparison?

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