14. Step 1: Global warming may be due to increased concentrations of greenhouse gases such as carbon dioxide (co2). Here are data from the National Oceanic and Atmospheric Administration Web site (www.noaa.gov), where co2 is measured in parts per million by volume: CO, 315.98 324.62 336.78 352.90 368.14 387.35 Year 1959 1969 1979 1989 1999 2009 A regression line for predicting carbon dioxide from time is predicted carbon dioxide concentration = 311.662 1.43866 x (years elapsed since 1959). (Fill in the blanks below and give your answers to 4 decimal places.) What is the slope of this line? (1) For each additional year the amount of carbon dioxide is increasing by (2)_ parts per million by volume. eBook Answer 1 Answer 2 Continue

Ocean currents are important in studies of climate change, as well as ecology studies of dispersal of plankton. Drift bottles are used to study ocean currents in the Pacific near Hawaii, the Solomon Islands, New Guinea, and other islands. Let x represent the number of days to recovery of a drift bottle after release and y represent the distance from point of release to point of recovery in km/100. The following data are representative of one study using drift bottles to study ocean currents. x days y km/100 71 76 31 92 203 14.2 19.6 5.8 11.2 35.9 (a) Verify that Ex = 473, Ey = 86.7, Ex = 61,451, Ey = 2033.69, Exy = 10995.7, and r 0.93868. %3D %3D %3D %3D Σχ 1 473 ΣΥ| 86.7 Ex2 61451 Ey2 2033.69 Exy 10995.7 r0.93868 (b) Use a 1% level of significance to test the claim p > 0. (Use 2 decimal places.) t 4.72 critical t 4.54 Conclusion Reject the null hypothesis, there is sufficient evidence that p > 0. O Reject the null hypothesis, there is insufficient evidence that p > 0. Fail to reject…

Question 2 A regression was run to determine if there is a relationship between hours of study per week (x) and the final exam scores (y). The results of the regression were: y=ax+b a=6.992 b=38.9 > r²=0.779689 r=0.883 Use this to predict the final exam score of a student who studies 4 hours per week, and please round your answer to a whole number.

1.