Imagine that you are a researcher in the Department of Public Health at California. You are working on a project that explores the association between PM2.5 and the prevalence of cardiovascu

PM2.5 refers to the atmospheric particle matter (PM) with a diameter of 2.5 micrometers (μm) or less. Sources of PM2.5 include power plants, motor vehicles, airplanes, forest fires, and dust storms. Compared with heavier and larger particles, PM2.5 tends to stay longer in the air thus has greater toxicity. Humans and animals are more likely to inhale PM2.5 into their bodies. The literature has suggested that long-term exposures to PM2.5 may lead to increased risks of cardiovascular mortality, birth defects, diabetes, etc.
Imagine that you are a researcher in the Department of Public Health at California. You are working on a project that explores the association between PM2.5 and the prevalence of cardiovascular diseases in the state. One of your goals is to make a continuous surface of PM2.5 concentrations based on the measurements from the air quality monitor sites scattering across California.
Q4 Describe the patterns of the interpolated surface
Q5 What differences can you observe between this prediction map and the map created in Q4?
Q6 What differences can you observe between this prediction map and the map created in Q4?