Use engine size to predict the car’s width. Answer thequestions.

I) For each additional 3.0 liter in engine size how muchthe car’s width will change? (11.11 points)

• a. It will increase by 2.42 units.
• b. It will increase by 7.27 units.
• c. It will increase by 68.2 units.
• d. It will increase by 63.3 units.
• e. Not applicable.

II) After performing the regression analysis you areasked to pick one number that would best answer the question: Arethese two variables, engine size and car width, related or not?What is this number and why? (11.11 points)

• a. The number is the slope and it clearly indicates therelation: For each additional liter in engine size the car’s widthincreases.
• b. This number is R-square and since it is not close to 1 wecannot claim that these two variables are related.
• c. The number is the P-value, which in this case is very lowindicating a strong probability that the two variables arerelated.
• d. None of these.

III) Given a car that has engine size of 2.0 liters useregression analysis and all available information in there, inorder to predict this car’s width. What is your intervalprediction?   (11.11 points)

• a. [66.36, 70.09]
• b. ± 1.8
• c. 68.2
• d. 63.3
• e. Not applicable

EngineSize	Width
1.6	66
1.6	66
2.2	69
2.2	68
2.2	69
2	67
2	67
2	67
2	67
2	67
2	67
1.7	67
1.7	67
1.7	68
1.6	66
1.6	66
1.6	66
2	68
2	68
2	68
2.4	72
1.6	66
1.6	66
1.8	68
1.8	68
1.8	68
1.6	67
1.8	67
1.8	67
2.2	68
2.2	67
2.2	67
2.2	67
2.2	68
2.2	68
1.5	67
2.3	68
2.3	68
2	68
2	68
1.8	67
1.8	67
1.8	67
1.5	65
1.5	65
1.5	65
3.1	73
3.4	73
2.2	70
3.5	70
3.4	73
2.4	67
2.4	67
2.4	71
2.7	71
2.7	75
2.4	71
2.4	71
2	67
3	73
3	73
2.4	71
2.4	71
1.7	68
2	67
1.4	68
2	67
2.7	72
2.7	72
2.7	72
2.3	70
3	73
1.6	67
2.5	70
2.5	67
2.2	70
3.4	70
3.8	74
2.2	68
3	69
2.5	69
2.5	69
2.5	72
2.4	71
3	71
2.4	72
3.3	72
1.5	68
2	68
1.8	68
1.9	68
1.8	68
2	68
2.4	69
1.8	70
2.5	69
3.8	74
3.8	73
3.8	73
3.8	73
3.8	73
3.5	70
3.8	73
3.5	74
2.7	74
3.5	74
2.4	67
2.4	64
3.5	75
4.6	78
4.6	78
3	72
3	71
3.5	72
3.5	72
3.5	69
3.5	72
2.5	70
1.8	68
3.2	68
4.6	78
4.6	78
3	73
3.5	70
3.8	72
3.5	70
3.5	72
3.5	72
3.4	70
3.8	74
2.5	69
2.5	69
3	69
3	72
3	71
3.3	72
2.8	68
2	68
1.8	69
1.9	68
3.2	72
1.8	70
3	70
3	70
3	70
3	71
3	71
2.5	69
2.5	69
2.5	69
3	69
3	69
3	69
2.5	73
3.8	74
3.8	75
3.6	71
3.5	74
2.7	69
4.6	78
3.5	69
3.5	70
3	70
3.3	71
3	68
3	68
3	73
3	73
2.6	68
2.6	68
3.2	68
3.2	68
4.6	78
4.6	78
2	69
2	69
2.3	71
2.3	71
3	69
3	72
2.8	69
4	69
2.5	71
2.3	71
2.5	71
2.9	72
2.5	72
3.5	72
3.5	72
3	70
3	70
2.7	71
4.2	71
4.2	75
4.2	70
3	69
3	73
4.4	73
4.4	75
4.4	75
3.8	75
4.6	74
4.6	74
4.6	75
4.5	70
4.5	73
3	72
4.2	72
4.2	72
4.2	73
4.2	73
4.2	73
3	71
4.3	71
4.3	72
3.9	73
3.9	73
4.6	78
4.6	78
4.6	78
3.2	68
5	73
5.5	73
3.2	69
5	69
3.2	71
5	71
4.3	73
5	73
2	69
2	69
2.4	72
2.3	72
2.9	72