Consider the graph of the global mean surface air temperature anomaly shown in Figure 2-1….

Consider the graph of the global mean surface air temperature anomaly shown in Figure 2-1. Suppose that the data were separated into two segments: 1880–1940 and 1941–2004. You are asked to use the two-sample t-test to investigate the claim that the mean temperature anomaly is higher in the second time segment than in the first. Is this a legitimate use of the t-test? Are all the assumptions satisfied?

 

 

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