Concerns about global warming have led to studies of the relationship between global temperature and the concentration
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Concerns about global warming have led to studies of the relationship between global temperature and the concentration of carbon dioxide (CO2). Listed below are concentrations (in parts per million) of CO2 and temperatures (in C) for different years (based on data from the Earth Policy Institute). Is there a linear correlation between temperature and concentration of CO2?
Construct a scatterplot, find the value of the linear correlation coefficient r, and find the critical values of r from Table A-6 using ? = 0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.?
Transcribed Image Text:
CO₂ Temperature 314 317 13.9 14.0 331 339 346 354 14.3 14.1 14.5 320 326 13.9 14.1 14.0 361 369 14.5 14.4 TABLE A-6 Critical Values of the Pearson Correlation Coefficient r n TELEFONNING 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 25 30 35 40 45 50 60 70 80 90 100 α = .05 .950 .878 811 .754 .707 .666 .632 .602 576 .553 .532 .514 .497 482 468 .456 444 .396 .361 .335 312 294 279 254 236 220 207 .196 a = .01 .990 .959 .917 .875 .834 .798 .765 .735 .708 .684 .661 .641 .623 .606 .590 .575 .561 .505 .463 .430 .402 .378 .361 .330 .305 286 .269 .256
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