Question
I would like to estimate the selling price of a used Toyota Camry. The independent variable is the mileage of the cars. The price is
I would like to estimate the selling price of a used Toyota Camry. The independent variable is the "mileage" of the cars. The price is in dollars and the mileage is in miles. Multiple regression model is fitted to the data. Please use the partial outputs from a statistics software follow to answer the following questions (5-10):
What is the coefficient of correlation between the price and the mileage?
Question 5 options:
-0.5423 | |
0.571 | |
0.5423 | |
-0.571 |
Question 6 (1 point)
On average, by how much will the price of the car increase (or decrease) if the car is used for 4000 more miles?
Question 6 options:
increases by $599.149837 | |
increases by $599 | |
decreases by $599 | |
decreases by $599.149837 |
Question 7 (1 point)
What is the p-value associated with the test of hypothesis,
H0:1=0 vs. H1:1
Question 7 options:
0.0028 | |
0.0055 | |
0.0110 | |
1.0055 |
Question 8 (1 point)
What is the conclusion of the above test of hypothesis? Use 5% level of significance.
Question 8 options:
There is sufficient evidence to conclude that price decreases with the increase in miles. | |
There is insufficient evidence to conclude that price increases with the increase in miles. | |
There is some evidence to conclude that price decreases with the increase in miles. | |
There is sufficient evidence to conclude that price increases with the increase in miles. |
Question 9 (1 point)
What would be the 80% confidence interval for the true slope of the regression line?
Question 9 options:
(0.0010, 0.0038) | |
(-0.2136853, -0.08598871) | |
(-0.2136853, 0.08598871) | |
(0.08598871, 0.2136853) |
Question 10 (1 point)
Predict the price of a car with 42000 miles in it.
Question 10 options:
26625.23 | |
16628.12 | |
3224.23 | |
32157.23 |
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