An energy economist studying the growth and decay of both the coal and natural gas industries wanted to leverage data collected by environmental scientists. Particularly, the economist wanted to study the link between the total yearly carbon emissions from both energy sources. They looked at 30 years of total yearly carbon emissions for a particular nation (measured in million metric tons of carbon dioxide) for both forms of energy. The data is provided below. Use Excel to calculate the correlation coefficient r between the two data sets. Round your answer to two decimal places. MMTons CO2 Natural Gas MMTons CO2 from Coal
144.975 1552.524
173.578 1519.755
168.448 1517.232
183.205 1537.343
178.596 1528.600
190.391 1658.477
212.140 1708.757
222.428 1626.367
210.728 1810.590
219.543 1733.430
257.485 1773.156
256.113 1828.702
274.249 1991.943
292.051 1807.748
316.249 1849.436
272.586 1948.157
310.474 1874.673
313.879 1923.322
340.916 1999.025
356.621 2057.241
368.335 1959.583
362.115 1805.112
399.512 1809.525
392.326 1745.279
468.730 1570.326
434.550 1513.523
456.864 1512.334
503.702 1369.385
561.474 1245.502
490.599 1258.338