Answer
$Mean=2.693$ thousands of metric tons of $CO_2$ per capita.
$Median=2.66$ thousands of metric tons of $CO_2$ per capita.
Work Step by Step
Per capita emissions in ascending order:
0.39, 1.35, 1.88, 2.41, 2.61, 2.71, 2.82, 2.95, 4.61, 5.20
$Mean=\frac{0.39+1.35+1.88+2.41+2.61+2.71+2.82+2.95+4.61+5.20}{10}=2.693$
There are 10 observations (even). The median is the mean of the fifth and sixth observations.
$Median=\frac{2.61+2.71}{2}=2.66$
