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Lesson:
11.3
Paired
Difference
Test
ANGEL
GARZA
.
10/19
Question
3
of
5,
Step
4
of
5
e
\
V2
v
Correct
\2
A
major
oil
company
has
developed
a
new
gasoline
additive
that
is
supposed
to
increase
mileage.
To
test
this
hypothesis,
ten
cars
are
randomly
selected.
The
cars
are
driven
both
with
and
without
the
additive.
The
results
are
displayed
in
the
following
table.
Can
it
be
concluded,
from
the
data,
that
the
gasoline
additive
does
significantly
increase
mileage?
Letd
=
(gas
mileage
with
additive)—(gas
mileage
without
additive)
.
Use
a
significance
level
of
@
=
0.05
for
the
test.
Assume
that
the
gas
mileages
are
normally
distributed
for
the
population
of
all
cars
both
with
and
without
the
additive.
Car
1
2
3
<
5
6
V4
8
9
10
Without
additive
|
11.5
|
27.2
|
183
|
15.8
|
179
|
127
|
20
|
163
|
13.8
|
23.7
With
additive
144|275
|
21.8
193
|
19.2
|
13.1
|
23.1
|
19.1
|
14.6
|
26.6
Copy
Data
Step
4
of
5:
Determine
the
decision
rule
for
rejecting
the
null
hypothesis
Hy.
Round
the
numerical
portion
of
your
answer
to
three
decimal
places.
Answer
&
Tables
B
Keypad
Keyboard
Shortcuts
Previous
Step
Answers
Reject
Hy
if
M
>
5.245
v
Correct
Answer:
Reject
Hy
ift
>
1.833
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Solution
