For several countries, the correlation with Internet use is 0.760 for GDP, 0.670 for cellular-phone use, 0.680 for literacy,

-0.780 for fertility, and -0.690 for CO₂emissions.

(a) Which variable has thestrongestlinear association with Internet use?

GDP

cellular-phone use

literacy

fertility

CO₂

(b) Which variable has theweakestlinear association with Internet use?

GDP

cellular-phone use

literacy

fertility

CO₂

(c) Interpret the correlation between Internet use and fertility (the mean number of children per adult woman).

Negative correlation, so countries with higher fertility rates tend to have higher Internet use and vice versa.

Positive correlation, so countries with higher fertility rates tend to have higher Internet use and vice versa.

Positive correlation, so countries with higher fertility rates tend to have lower Internet use and vice versa.

Negative correlation, so countries with higher fertility rates tend to have lower Internet use and vice versa.