# Summary

Let's wrap up this chapter.

## We'll cover the following

This section begins with the substantive question of whether trade openness and economic growth are correlated, which motivates both data preparation and statistical analysis. The chapter first illustrates how to get data ready and then demonstrates how to visualize the relationship between two variables using a scatter plot. The chapter shows how to use covariance and correlation coefficient to test whether trade openness and economic growth are correlated in the population and to estimate the strength of their correlation.

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