Question

HYPOTHESIS TESTING

Climate change is a topic of both academic and political interest. The National Climatic Data Center has recorded temperature data since 1800. You can explore their data at: http://data.giss.nasa.gov/gistemp/

The following chart compares the average Land-Surface Air Temperatures for year since 1961 to the 20^th century average Land-Surface Air Temperature.

Year	Temp Change, °C
1961	0.075
1962	0.038
1963	0.079
1964	-0.207
1965	-0.111
1966	-0.031
1967	-0.005
1968	-0.044
1969	0.076
1970	0.028
1971	-0.105
1972	0.001
1973	0.140
1974	-0.079
1975	-0.048
1976	-0.161
1977	0.125
1978	0.011
1979	0.083
1980	0.179
1981	0.261
1982	0.045
1983	0.257
1984	0.088
1985	0.046
1986	0.126
1987	0.262
1988	0.312
1989	0.190
1990	0.373
1991	0.346
1992	0.125
1993	0.133
1994	0.233
1995	0.370
1996	0.288
1997	0.393
1998	0.566
1999	0.317
2000	0.328
2001	0.477
2002	0.556
2003	0.547
2004	0.481
2005	0.623
2006	0.545
2007	0.570
2008	0.437
2009	0.570

At the a = 0.05 significance level, conduct a hypothesis test for the claim that the mean Land-Surface Air Temperature has not changed (m = 0). Be sure to include your hypotheses, the critical value(s), the standardized test statistic, and your initial and final conclusions.

Answer 1

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