Homework/study practice question for review: UploadCars04-1 Link for additional information: https://www.limes.one/Content/DataFiles/Cars04.txt data and use engine size to predict the car's weight. Answer the questions.

I) For an additional 2.0 liter in engine size how much the car's weight will change?(11.11 points)

• a. It will increase 481 pounds.
• b. It will increase by 962 pounds.
• c. It will increase by 2880 pounds.
• d. It will increase by 1918 pounds.
• e. Not applicable.

II) After performing the regression analysis you are asked to pick one number that would best answer the question: Are these two variables, engine size and car's weight, related or not? What is this number and why?(11.11 points)

• a. The number is the P-value, which in this case is very low indicating a strong probability that the two variables are related.
• b. The number is the slope and it clearly indicates the relation: For each additional liter in engine size, the car's weight increases.
• c. This number is R-square and since it is not close to 1 we cannot claim that these two variables are related.
• d. None of these.

III) Given a car that has engine size of 3.0 liters use regression analysis and all available information in there, in order to predict this car's weight. What is your interval prediction?(11.11 points)

• a. [3079,3644]
• b. 282
• c. 1918
• d. 3361
• e. Not applicable