Among the following methods of the spatial analysis, which group of techniques all employ interpolation (generation of a continuous surface of values from discrete data points) to investigate public health research questions using GIS?

a. Spatial cluster analysis, kernel estimation, and kriging
b. Spatial cluster analysis, smoothing techniques, and regression analysis
c. Spatial filtering, kernel estimation, and kriging
d. Spatial autocorrelation, smoothing techniques, and regression analysis


Ans: c

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