Use the Vostok data in Exercise 2.28 to estimate the regression models C = 1 +

Use the Vostok data in Exercise 2.28 to estimate the regression models C = α₁ + β₁A + ε₁

and A = α₂ + β₂D + ε₂. Write a brief essay summarizing your findings.

Exercise 2.28

The Soviet Antarctica Expeditions at Vostok analyzed an ice core that was 2,083 meters long to estimate the atmospheric concentrations of carbon dioxide during the past 160,000 years . Table 2.13 shows some of their data, where D is the depth of the ice core, in meters; A is the age of the trapped air, in years before present; and C is the carbon dioxide concentration, in parts per million by volume. Draw a time series graph of atmospheric carbon dioxide concentration over the past 160,000 years. (Show the most recent period on the right-hand side of the horizontal axis.) What patterns do you see?

Transcribed Image Text:

Depth D Age A Carbon C Depth D Age A Carbon C 126.4 1,700 274.5 1,225.7 80,900 222.5 302.6 9,140 259.0 1,349.0 90,630 226.0 375.6 12,930 245.0 1,451.5 98,950 225.0 474.2 20,090 194.5 1,575.2 110,510 233.5 602.3 30,910 223.0 1,676.4 119,500 280.0 748.3 42,310 178.5 1,825.7 130,460 275.0 852.5 50,150 201.0 1,948.7 140,430 231.0 975.7 59,770 201.0 2,025.7 150,700 200.5 1,101.4 70,770 243.0 2,077.5 159,690 195.5