22 Mongolian desert ants. The Journal of Biogeography (Dec.

2003) did a study of ants in Mongolia. Data on annual rainfall, maximum daily temperature, and number of ant species recorded at each of 11 study sites are listed in the table and saved in the GOBIANTS file.

a. Consider a straight-line model relating annual rainfall ( y ) and maximum daily temperature ( x ). A MINITAB printout of the simple linear regression is shown below. Give the least squares prediction equation.

b. Construct a scatterplot for the analysis you performed in part

a. Include the least square line on the plot.
Does the line appear to be a good predictor of annual rainfall?

c. Now consider a straight-line model relating number of ant species ( y ) to annual rainfall ( x ). On the basis of the MINITAB printout below. repeat parts a and b.

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Site Region Annual Rainfall (mm) Max. Daily Number of Temp. (C) Ant Species 1 Dry Steppe 196 5.7 2 Dry Steppe 196 5.7 3 Dry Steppe 179 7.0 4 Dry Steppe 197 8.0 5 Dry Steppe 149 8.5 S31375 52 6 Gobi Desert 112 10.7 49 7 Gobi Desert 125 11.4 5 8 Gobi Desert 99 10.9 4 9 Gobi Desert 125 11.4 10 Gobi Desert 84 11.4 11 Gobi Desert 115 11.4 454 5 4 Based on Pfeiffer, M., et al. "Community organization and species richness of ants in Mongolia along an ecological gradient from steppe to Gobi desert." Journal of Biogeography, Vol. 30, No. 12, Dec. 2003 (Tables 1 and 2).