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Solutions
1.
a)
16.6733
y
=
b)
s=1.4521
c)
Since
(14)
(.005)
2.977
t
=
,
the interval is
1.4621(2.977)
16.6733
15
.
=(15.5494, 17.7972)
d)
:
18
:
18
o
a
H
H
μ
μ
=
<
e)
16.6733
18
3.5143
1.4621/
15
T
-
=
= -
f)
(14)
(.05)
1.761
t
-
= -
. Reject
o
H
.
g)
p-value<.005
h)
:
18
:
18
o
a
H
H
μ
μ
=
i)
(14)
(14)
(.1/ 2)
(.05)
1.761
t
t
=
=
. Reject
o
H
.
j)
p-value<.005(2)=.01
2) a)
p.11
b)
p.4
c)
p.6
3.
a)
population mean of personal expenditures when GDP is $4000 billion.
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Unformatted text preview: b) Called the slope. It is the change in | y x associated with a one unit increase in x. c) Called the intercept. It is the population mean of y when x=0; that is, |0 y . d) Use the formulas on page 88. e) 2(.7064)= $1.4128 billion. f) g) -184.078+.7064(4700)=$3136.002 billion...
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- Spring '08
- Cui
- Mean, unit increase, personal expenditures
-
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