0
4
>
St
L
Points:
1
of
1
-——-—
The
samples
in
the
accompanying
table
are
observations
taken
from
the
same
elements
at
two
different
times.
Complete
parts
a
and
b.
Question
list
1<
EH
Click
the icon
to
view
the
data
table.
@
Question
1
a.
Let
py
=4
-
p,.
Assume
that
the
populations
are
normally
distributed
and
construct
a
99%
confidence
interval
for
the
difference
in
the
means
of
the
distribution
at
.
the
times
in
which
the
samples
were
taken.
@
Question
2
6.2387
<p4
<
9.5327
(Round
to
four
decimal
places
as
needed.)
x
.
%
Question
3
b.
Perform
a
test
of
hypothesis
to
determine
if
the
difference
in
the
means
of
the
distribution
at
the
first
time
period
is
more
than
8
units
larger
than
at
the
second
time
period.
Use
a
level
of
significance
equal
to
0.01.
Determine
the
null
and
alternative
hypotheses.
Choose
the
correct
answer
below.
@
CQuestion
4
¥
A
Hp:
pgs8
"
Hgipg28
Haipg>8
Haipg
<8
@
AQuestion
5
Hp:
pg
=0
Hp:ipg=8
Ha:
g
#0
Ha:
g
#8
%
Question
6
Find
the
rejection region.
Choose
the
correct
answer
below
and
fill
in
any
answer
boxes
in
your
choice.
(Round
to
four
decimal
places
as
needed.)
%,
Question
7
-
i<
Ve
t>
31427
@
Question
8
t>
ort<
Calculate
the
test
statistic.
t=
-0.2573
(Round
to
four
decimal
places
as
needed.)
Reach
a
conclusion.
Since
the
test
statistic
is
less
than
the
critical
value(s),
do
not
reject
Hg.
There
is
insufficient
evidence
to
conclude
that
the
difference
in
the
means
of
the
distribution
at
the
first
time
period
is
more
than
8
units
larger
than
at
the
second
time
period.
-
X
Data
table
]
Unit
Sample
1
Sample
2
1
12.9
6.1
17.8
8.6
3
21.7
12.5
4
12.3
5.1
5
18.2
10.8
6
16.9
10.4
7
12.1
3.2
