Homework 3, Due F 02/02
Read Chapter 4 (Moore).
Problems
1. Download the attached plot and data set.
a) What does the plot show? What is the explanatory variable, xand the
response variable, y?
b) For each point, .on the plot, mark the corresponding SNO from the data
set. Are there any outliers? What is the point *?
c) Compute the correlation between Age in years and Year of birth from
the data set. What does it tell you?
d) Remove the outliers and recompute the correlation. What do you see?
Why?
e) Using 0 for Fand 1 for M, compute the correlation between Age and
Sex. What does it show?
f) What do you think the correlation will b e, if you use 1 for Fand 0 for
M? What if 1 for Fand 2 for M? You need not recompute the correlations but
give reasons for your answers.
2. Ex. 4.1, Page 92.
3. Ex. 4.4, Page 93.
4. Ex. 4.5, Page 96.
5. Ex. 4.10, Page 104.
6. Ex. 4.35, Page 112.
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