Extracted text: You hear a lot of talk about increasing global temperature, so you decide to
see for...

Question

Extracted text: You hear a lot of talk about increasing global temperature, so you decide to
see for yourself if there has been an actual change in recent years. You know
that the average land temperature from XXXXXXXXXXwas 8.79 degrees Celsius.
You find annual average temperature data from XXXXXXXXXXand decide to
construct a 99% confidence interval (because you want to be as sure as
possible and look for differences in both directions, not just one) using this
data to test for a difference from the previous average.
Year
Temp
Year
Temp
Year
Temp
Year
Temp
1981
9.301
1991
9.336
2001
9.542
2011
9.65
1982
8.788
1992
8.974
2002
9.695
2012
9.635
1983
9.173
1993
9.008
2003
9.649
2013
9.753
1984
8.824
1994
9.175
2004
9.451
2014
9.714
1985
8.799
1995
9.484
2005
9.829
2015
9.962
1986
8.985
1996
9.168
2006
9.662
2016
10.16
1987
9.141
1997
9.326
2007
9.876
2017
10.049
1988
9.345
1998
9.66
2008
9.581
1989
9.076
1999
9.406
2009
9.657
1990
9.378
2000
9.332
2010
9.828

Rochak · Accepted Answer

Inputs
Average Temperature (1981 – 2017) = 9.44
Standard Deviation = 0.35
Z value at 99% confidence interval = 2.

You hear a lot of talk about increasing global temperature, so you decide to see for yourself if there has been an actual change in recent years. You know that the average land temperature from...

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