Concern over the weather associated with El Nino has increased interest in the p

Question

Concern over the weather associated with El Nino has increased interest in the possibility that the climate on earth is gelling warmer. The most common theory relates an increase in atmospheric levels of carbon dioxide (CO_2). a greenhouse gas, to increases in temperature A regression analysis of the mean annual CO_2 concentration (in parts per million) in the atmosphere at the top of Mauna Loa in Hawaii and the mean annual air temperature (in degrees Celsius) over both land and sea across the globe for 37 years was performed. Assume all conditions are met for simple linear regression inference in words, what is the correct alternative hypothesis to test the theory proposed in this problem? Choose the correct answer below. A. Annual CO_2 levels over Mauna Loa do not help explain annual average global air temperature. B. Annual average global air temperatures do not help explain annual CO_2 levels over Mauna Loa. C. Annual average global air temperatures do help explain annual CO_2 levels over Mauna Loa. D. Annual CO_2 levels over Mauna Loa do help explain annual average global air temperature

Explanation / Answer

from reg eq

annual temperatures=15.31+0.004C02

R sq=30%=0.30

r=sqrt(0.30)=0.55

there exists a postive relationship between CO2 and annual temperature.

as CO2 levels increases temperature increases.

ANSWER D

ANNUAL C02 LEVELS OVER MAUNA LOA DO HELP EXPLAIN ANNUAL AVERAGE GLOBAL AIR TEMPERATURE

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