9.4
Practice
Take
Details
Question:
|
Exercise
09.24
(Population
Mean:
Sigma
Unknown)
asebOBN
Exercise
09.24
(Population
Mean:
Sgma
Unknowr)
1100
©
Right
2100
©
||
“Clieck
My
Work"
Clicked:
11
Times
Hint(s)
Check
My
Work
Consider
the
following
hypothesis
test:
Hy:p=18
Ha:p#18
A
sample
of
48
provided
a
sample
mean
Z
=
17
and
a
sample
standard
deviation
s
=
4.5.
1f
necessary,
round
your
answers
to
two
decimal
places.
Enter
negative
values
as
negative
numbers.
a.
Compute
the
value
of
the
test
statistic.
-1.54
b.
Use
the
¢
distribution
table
(Table
2
in
Appendix
B)
to
compute
a
range
for
the
p-value.
p-value
is
between
10/
@
ana
20
@
c.
At
@
=
0.05,
what
is
your
conclusion?
9w,
the
rejection
rule
using
the
critical
value?
p-value
is
|
greater
than
0.05,
do
not
reject
d.
what
Reject
Hy
if
tis
|
1ess
than
o
caual
102012
|
&
or
ti5
|
greater
than
or
caval
10
2012
v|
&,
your
conclusion?
154/
@
o
not
reect
9
H,
Hint(s)
Check
My
Work
9.4
Excel
Activity
2d
-
Hypothesis
Test
for
Mean,
¢
Unknown
(Freeform)
a.
Develop
a
hypothesis
test
that
can
be
used
to
determine
whether
the
mean
annual
consumption
in
Webster
City
is
higher
than
the
national
mean.
Hotu
=28
@
Hau>28v@
b.
What
is
a
point
estimate
of
the
difference
between
mean
annual
consumption
in
Webster
City
and
the
nati
1.12/€)
(2
decimals)
cAta=
.01,
test
for
a
significant
difference
by
completing
the
following.
Calculate
the
value
of
the
test
statistic
(2
decimals).
0.80@
The
p-valueis|
0.218/@
(4
decimals)
Reject
the
null
hypothesis?
)
What
is
your
conclusion?
Calculation
|
Excel
Solution
.
Develop
a
hypothesis
test
that
can
be
used
to
determine
whether
the
mean
annual
consumption
in
Webster
City
is
higher
than
the
national
mean.
Hotuls
238
Hayul>
238
b.
What
s
a
point
estimate
of
the
difference
between
mean
annual
consumption
in
Webster
City
and
the
national
mean?
102
(2
decimals)
c.
Ata
=
0.01,
test
for
a
significant
difference
by
completing
the
following
Calculate
the
value
of
the
test
statistic
(2
decimals).
080
(2
decimals)
