It's a Statistic question: Critical Thinking: Lurking Variable Over the past 30 years in the United States, there has been a stong negative correlation between the number the number of infant deaths at birth and the number of people over age 65. a) Is the fact that people are living longer causing a decrease in infant mortalities at birth?
b) What lurking variables migh be causing the increase in one or both of the variables? Explain.

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.