Question

Citizens in
have a life expectancy of 82 years.

Citizens in
receive 11.6 years of education on average.

This chart suggests that countries with a long life expectancy and a high level of education have a
HDI ranking.

Answer 1

I don’t have the chart or the country name — could you upload the image or tell me which country the chart labels?

From the description, the blank at the end should be: "high" (more precisely, often "very high" in UNDP HDI categories).

So: "This chart suggests that countries with a long life expectancy and a high level of education have a high (often very high) HDI ranking."