Ivo Dinov UCLA Statistics, Neurology, LONI, Math/PIC 

STAT 13 (1a, 1b, 1c) 
Introduction to Statistical Methods for the Life and Health Science 
Department of Statistics 
Instructor: Ivo Dinov 
Homework 2 
Due Date: Wednesday, Oct. 20, 2004 
Backpack Code  PM  MM  BL  DS  CM  MR  MP  RP  JC  CB  EW  EA 
Price($)  38  40  50  48  35  35  45  50  35  95  40  40 
Volume  1586  1810  2200  1874  1810  1950  1670  1500  1635  1102  1700  1500 
Number of Books  41  45  46  52  48  49  49  40  73  38  49  51 
Age: x 
0 
1 
1 
1 
2 
3 
4 
5 
5 
9 
11 
12 
12 
Price: y 
16.2 
17.1 
16.0 
16.2 
11.7 
12.8 
10.0 
9.0 
6.0 
2.5 
2.0 
1.9 
1.5 
a. Construct
a scatter plot of the paired data (Age vs. Price).
b. What does the
scatter plot convey to you about the price of a vehicle in relation to
its age?
c. If you were to draw
a line showing the trend in the relationship you described in (b), what
would be its direction as you move from left to right? What could
you say about its slope?
d. Draw the line that
you believe fits the data the best.
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