Intuitive Introductory Statistics pp 839-905 | Cite as

# Statistical Inference for Bivariate Populations

## Abstract

Many questions of interest (both in research and in applications) involve the relationship between two simultaneously collected variables (bivariate observations). For example, is there a relationship between the size of alumni donations to the general fund of a university and the performance of its basketball and football teams? How does the amount of annual rainfall affect the wheat yield in the United States? Does the amount of fracking wastewater injected into deep wells have an effect on the number and severity of earthquakes in the region? Is there any relationship between CO_{2} production and sea levels? How does a prescribed diet-medication regimen affect blood pressure levels in subjects with severe high blood pressures? Is there any relationship between pine needle length and diameter of a pine tree? Does smoking or excessive drinking have an impact on mortality? Problems such as these are addressed statistically through the use of correlation or regression analyses.

## Supplementary material

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