Question

WhichdescriOne statistic used to measure a country's wealth is itsgross domestic product (GDP). A higher GDPindicates greater wealth in the country. A researchercompared the GDP per person for 12 countries withthe life expectancy of that country. The data for the 12countries are shown in the scatterplot. The value ofrfor the scatterplot is 0.608.Ο ΤΗThexpo coexcСоexpCountry WealthCou90ex

Answer 1

To answer this question, we can observe that the correlation coefficient for the explanatory variable, GDP, and the response variable, Life Expectancy, is not so weak, r = 0.608, and tend to be a strong correlation coefficient.

It means that both described variables are positively correlated, that is, an increase in the explanatory variable, GDP, implies an increase in the response variable, Life Expectancy.

We can see this from the given graph - if we see the values on the right, we have higher values for life expectancy than, for instance, the first value near the origin of the graph.

Therefore, we can say as we have greater values for GDP, we will expect a higher life expectancy.

In summary, then, we can say that:

"Countries with higher GDPs tend to have higher life expectancies." (last option.)