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Question 5
Analyse the data shown in Figures 9a, 9b and 9c. Figure 9a shows the world's top ten coal producing countries in 2015. Figure 9b shows coal consumption in the top t... show full transcript
Step 1
Answer
From Figure 9a, it is evident that China is the leading producer of coal, with a production level of 2,480 million tonnes of oil equivalent (mtoe), which is more than three times that of the second highest producer, the USA, which has 764 mtoe. This significant domination by China suggests a strong influence on global coal production. Countries such as India, Australia, and Indonesia follow, highlighting that most of the world's coal production is concentrated in a few countries.
Step 2
Answer
In Figure 9b, we observe the coal consumption data for the top ten consuming countries and the rest of the world. China again stands out, consuming 1,920 mtoe or roughly 78.2% of the total consumption. This is a reflection of its high level of production. Other significant consumers include India and the USA, with consumption figures of 530 mtoe and 407 mtoe, respectively. Notably, the total share of the top five consumers represents over 80% of global consumption, indicating a high level of concentration in coal usage.
Step 3
Answer
Figure 9c presents a Spearman's rank calculation, which indicates a correlation (Rs value of 0.806) between coal production and consumption. The critical value at the 0.05 significance level is 0.648, suggesting that the null hypothesis can be rejected in favor of the alternative that a relationship exists between coal production and consumption. Thus, there is strong evidence to support the notion that higher production correlates with higher consumption of coal in these top countries.
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