# Question: The least squares regression equation y hat 0 7676x 52 6841 relates

The least-squares regression equation y-hat = 0.7676x - 52.6841 relates the carbon dioxide emissions (in hundred thousands of tons), y, and energy produced (hundred thousands of megawatts), x, for all countries in the world in 2010.

(a) Interpret the slope.

(b) Is the y-intercept of the model reasonable? Why? What would you expect the y-intercept of the model to equal? Why?

(c) For 2010, the lowest energy-producing country was Rwanda, which produced 0.094 hundred thousand megawatts of energy. The highest energy-producing country was the United States, which produced 4190 hundred thousand megawatts of energy in 2010. Would it be reasonable to use this model to predict the CO2 emissions of a country if it produced 6394 hundred thousand megawatts of energy in 2010? Why or why not?

(d) In 2010, China produced 3260 hundred thousand megawatts of energy and emitted 3120 hundred thousand tons of carbon dioxide. What is the residual for China? How would you interpret this residual?

(a) Interpret the slope.

(b) Is the y-intercept of the model reasonable? Why? What would you expect the y-intercept of the model to equal? Why?

(c) For 2010, the lowest energy-producing country was Rwanda, which produced 0.094 hundred thousand megawatts of energy. The highest energy-producing country was the United States, which produced 4190 hundred thousand megawatts of energy in 2010. Would it be reasonable to use this model to predict the CO2 emissions of a country if it produced 6394 hundred thousand megawatts of energy in 2010? Why or why not?

(d) In 2010, China produced 3260 hundred thousand megawatts of energy and emitted 3120 hundred thousand tons of carbon dioxide. What is the residual for China? How would you interpret this residual?

**View Solution:**## Answer to relevant Questions

The following data represent commute times (in minutes) and score on a well-being survey. Commute Time Gallup-Healthways Well-Being (minutes), x ....... Index Composite Score, y 5 .......... 69.2 15 .......... 68.3 25 ...Research performed at NASA and led by Emily R. Morey-Holton measured the lengths of the right humerus and right tibia in 11 rats who were sent to space on Spacelab Life Sciences 2. The following data were collected. (a) ...It is well known that women should not smoke while pregnant, but what is the effect of smoking on a baby’s birth weight? Researchers Ira M. Bernstein and associates “sought to estimate how the pattern of maternal smoking ...Use the results from Problem 29 in Section 4.1 and Problem 21 in Section 4.2. (a) What proportion of the variability in miles per gallon is explained by the relation between weight of the car and miles per gallon? (b) ...(a) Construct a frequency marginal distribution. (b) Construct a relative frequency marginal distribution. (c) Construct a conditional distribution by x. (d) Draw a bar graph of the conditional distribution found in part ...Post your question