求救...趕功課~唔識statistics...身在外國,沒人教路~(3)

HY Law

2007-04-01 6:59 am

Question 3
Classified ads in the Australian offered several used Toyota Corollas for sale. Listed below are the ages of the cars and the advertised prices.
Age (yr)Prices Advertised ($)
112995, 10950
210495
310995, 10995
46995, 7990
58700, 6995
65990, 4995
93200, 2250, 3995
112900, 2995
131750

a)Make a scatterplot for these data.[2 Marks]
b)Describe the association between age and price of a used Corolla. Do you think a linear model is appropriate?[2 Marks]

回答 (1)

myisland8132

2007-04-01 8:23 pm

✔ 最佳答案

(A)
The following is the data

Age
Price

1
12995

1
10950

2
10495

3
10995

3
10995

4
6995

4
7990

5
8700

5
6995

6
5990

6
4995

9
3200

9
2250

9
3995

11
2990

11
2995

13
1750
The scatterplot for these data is

圖片參考：http://in.geocities.com/myisland8132/11.JPG

(b) From the graph, it seems that there is a linear relationship between age and price of a used Corolla. When the age increased, then the price will be decreased and the rate is nearly constant. So I think linear model is appropriate

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