Question: Scenario: We will return to the World Development Indicators data in WDI. In this scenario, we will investigate the relationship between access to improved sanitation

Scenario: We will return to the World Development Indicators data in WDI. In this scenario, we will investigate the relationship between access to improved sanitation

(the percent of the population with access to sewers and the like) and life expectancy.

The response column is life_exp, and the factor is sani_acc.

a. Use the Local Data Filter to Show and Include only the observations for the Year 2015, and the Latin America & Caribbean Region nations. Evaluate the residuals and report on how well the data satisfy the OLS conditions.

b. Repeat the residuals analysis for East Asia & Pacific countries in 2015.

c. Now do the same one additional time for the countries located in Sub-Saharan Africa.

d. How do the three residuals analyses compare? What might explain the differences?

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