11.23 It is well known that large bodies of water have a mitigating effect on the temperature of the surrounding land masses. On a cold night in central Florida, temperatures (in degrees Fahrenheit)

were recorded at equal distances along a transect running in the downwind direction from a large lake. The data are in table below.

a Fit the linear model by the method of least squares.

b Find SSE and .

c Does it appear that temperatures decrease significantly as distance from the lake increases? Use a = 0.05.