Upload Cars04-1 Cars04-1 data and use engine size to predict thecar’s city gas mileage(City MPG). Answer the questions.

I) For each additional 2.0 liter in engine size how muchthe MPG will change? (11.11 points)

• a. It will decrease by 0.21 mpg.
• b. It will decrease by 8.21 mpg.
• c. It will be 25.49 mpg.
• d. For car with zero horse power we expect 33.7 mpg.
• 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 city gas mileage, related ornot? What is this number and why?  (11.11points)

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

III) Given a car that has the engine size of 3.0 litersuse regression analysis and all available information in there, inorder to predict this car’s city gas mileage. What is your intervalprediction? (11.11 points)

• a. ±4.15
• b. 33.7
• c. 21.38
• d. [17.09, 25.68]
• e. Not applicable

  EngineSize	CityMPG
  1.6	28
  1.6	28
  2.2	26
  2.2	26
  2.2	26
  2	29
  2	29
  2	26
  2	27
  2	26
  2	26
  1.7	32
  1.7	36
  1.7	32
  1.6	29
  1.6	29
  1.6	29
  2	26
  2	26
  2	26
  2.4	23
  1.6	26
  1.6	25
  1.8	24
  1.8	24
  1.8	24
  1.6	28
  1.8	28
  1.8	28
  2.2	24
  2.2	26
  2.2	26
  2.2	26
  2.2	26
  2.2	26
  1.5	32
  2.3	25
  2.3	25
  2	24
  2	22
  1.8	32
  1.8	32
  1.8	32
  1.5	35
  1.5	33
  1.5	35
  3.1	20
  3.4	21
  2.2	24
  3.5	22
  3.4	21
  2.4	22
  2.4	22
  2.4	22
  2.7	21
  2.7	21
  2.4	21
  2.4	21
  2	21
  3	20
  3	19
  2.4	26
  2.4	26
  1.7	32
  2	26
  1.4	46
  2	60
  2.7	19
  2.7	19
  2.7	20
  2.3	24
  3	20
  1.6	25
  2.5	21
  2.5	23
  2.2	24
  3.4	20
  3.8	20
  2.2	24
  3	20
  2.5	22
  2.5	21
  2.5	20
  2.4	24
  3	21
  2.4	24
  3.3	20
  1.5	59
  2	24
  1.8	24
  1.9	38
  1.8	24
  2	24
  2.4	22
  1.8	22
  2.5	20
  3.8	20
  3.8	20
  3.8	18
  3.8	20
  3.8	18
  3.5	23
  3.8	18
  3.5	18
  2.7	21
  3.5	19
  2.4	21
  2.4	22
  3.5	18
  4.6	17
  4.6	17
  3	21
  3	21
  3.5	17
  3.5	17
  3.5	18
  3.5	18
  2.5	18
  1.8	22
  3.2	19
  4.6	17
  4.6	17
  3	19
  3.5	18
  3.8	18
  3.5	21
  3.5	20
  3.5	20
  3.4	20
  3.8	20
  2.5	21
  2.5	20
  3	19
  3	21
  3	21
  3.3	20
  2.8	21
  2	24
  1.8	22
  1.9	22
  3.2	20
  1.8	23
  3	20
  3	17
  3	18
  3	20
  3	18
  2.5	20
  2.5	19
  2.5	19
  3	20
  3	20
  3	20
  2.5	19
  3.8	20
  3.8	20
  3.6	18
  3.5	18
  2.7	21
  4.6	17
  3.5	18
  3.5	19
  3	18
  3.3	20
  3	18
  3	18
  3	20
  3	20
  2.6	20
  2.6	19
  3.2	19
  3.2	20
  4.6	17
  4.6	17
  2	20
  2	20
  2.3	21
  2.3	21
  3	19
  3	21
  2.8	19
  4	18
  2.5	20
  2.3	20
  2.5	18
  2.9	20
  2.5	20
  3.5	18
  3.5	18
  3	20
  3	18
  2.7	18
  4.2	17
  4.2	17
  4.2	14
  3	19
  3	20
  4.4	18
  4.4	18
  4.4	18
  3.8	18
  4.6	18
  4.6	18
  4.6	18
  4.5	17
  4.5	17
  3	18
  4.2	18
  4.2	17
  4.2	18
  4.2	18
  4.2	17
  3	18
  4.3	18
  4.3	18
  3.9	17
  3.9	17
  4.6	17
  4.6	17
  4.6	17
  3.2	16
  5	16
  5.5	13
  3.2	20
  5	17
  3.2	19
  5	16
  4.3	18
  5	16
  2	21
  2	21
  2.4	21
  2.3	20
  2.9	19