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Chapter 9 Answers
1.
X
=
A
+1,
Y
=
B
,
r
= 0.400
2.
X
=
A
,
Y
= 2
B
,
r
= 0.400
3.
X
=
C
4,
Y
= 0.5
D
+1,
r
= 0.707
4.
X
= 3
C
2,
Y
= 2
D
+3,
r
= 0.707
5.
X
= 2
A
+1,
Y
=
B
4,
r
= 0.400
6. a)
X
Average= 40
X
SD = 20
Y
Average = 7
Y
SD = 4
r
= 0.400
b)
X
Average= 50
X
SD = 28.9
Y
Average = 5.83
Y
SD = 4.49
r
= 0.244
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Unformatted text preview: 7. a) Yes, X Y = . b) r = 0 c) The relationship is not linear. 8. No, r stays the same. 9. The first and third have the same correlation coefficient. 10. The first and second have the same correlation coefficient....
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This note was uploaded on 04/07/2008 for the course MATH 1680 taught by Professor Patton during the Spring '08 term at North Texas.
 Spring '08
 Patton
 Statistics

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