(Data file: Mitchell) The data shown in Figure 1.12 give average soil temperature in degrees C at 20 cm depth in Mitchell, Nebraska for 17 years beginning January 1976, plotted versus the month...

(Data file: Mitchell) The data shown in Figure 1.12 give average soil temperature in degrees C at 20 cm depth in Mitchell, Nebraska for 17 years beginning January 1976, plotted versus the month number. The data were collected by K. Hubbard (Burnside et al., 1996).

Summarize the information in the graph about the dependence of soil temperature on month number.

The data used to draw are in the file Mitchell. Redraw the graph, but this time make the length of the horizontal axis at least 4 times the length of the vertical axis.