Answered: 0.50 0.25 - 0.00 320 340 360 380 CO2…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Climate change and CO2 2011 Data collected from
around the globe show that the earth is getting warmer.
The most common theory relates climate change to an
increase in atmospheric levels of carbon dioxide (CO2),
a greenhouse gas. The mean annual CO2 concentration in
the atmosphere (parts per million) is measured at the top

of Mauna Loa in Hawaii, away from any local contami-
nants. (Available at ftp://ftp.cmdl.noaa.gov/ccg/co2/

trends/co2_annmean_mlo.tx)
The mean surface air temperature is recorded as the
change in °C relative to a base period of 1951 to 1980.
(Available at data.giss.nasa.gov/gistemp/graphs_v3/)
Here are a scatterplot and regression for the years from
1959 to 2011:Dependent variable is Temp
R-squared = 82.3%
s = 0.0985 with 53 - 2 = 51 degrees of freedom
Variable Coefficient SE(Coeff) t-Ratio P-Value
Intercept -2.98861 0.2086 -14.3 ...0.0001
CO2 0.0092 0.0006 15.4 ...0.0001
a) Write the equation of the regression line.
b) Is there evidence of an association between CO2 level
and global temperature?
c) Do you think predictions made by this regression will
be very accurate? Explain.
d) Does this regression prove that increasing CO2 levels
are causing global warming? Discuss.

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