Midterm 1 - Version A - Multiple Choice

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Unformatted text preview: Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 
 PSYCHOLOGY
60
 SPRING,
2010
 
 
 
 
 
 MIDTERM
1
 Tuesday,
April
20th,
2010
 
 
 
 
 
 
 FULL
NAME
___________________________________________________________________________________
 
 
 
 
 
 STUDENT
ID
__________________________________________________________________________________
 
 Please
put
your
name
and
ID
number
on
this
page
AND
on
the
Scantron
form.
 
 
 
 
 
 
 
 
 
 VERSION
A
 
 1
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 This
page
is
intentionally
blank.
 
 2
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 3
 
 
 1) 2) 3) 4) 5) For
a
distribution
of
scores,
which
of
the
following
z‐score
values
represents
the
most
extreme
 location
on
the
left‐hand
side
of
the
distribution?
 a. z
=
+1.00
 b. z
=
+2.00
 c. z
=
‐1.00
 d. z
=
‐2.00*
 e. cannot
determine
from
the
information
given
 
 The
relationship
between
a
statistic
and
a
sample
is
the
same
as
the
relationship
between:
 a. a
sample
and
a
parameter
 b. a
sample
and
a
population
 c. a
statistic
and
a
parameter
 d. a
parameter
and
a
population*
 e. descriptive
statistics
and
inferential
statistics
 
 If
it
is
not
possible
to
divide
the
existing
categories
of
a
variable,
then
it
is
an
example
of
a
 _________
variable.
 a. construct
 b. independent
 c. dependent
 d. continuous
 e. discrete*
 
 One
item
on
a
questionnaire
asks,
“How
many
siblings
(brothers
and
sisters)
do
you
have?”

A
 researcher
computes
the
mean,
the
median,
and
the
mode
for
a
set
of
n
=
50
responses
to
this
 question.

Which
of
the
following
statements
accurately
describes
the
measures
of
central
 tendency?
 a. because
the
scores
are
all
whole
numbers,
the
mean
will
be
a
whole
number
 b. because
the
scores
are
all
whole
numbers,
the
median
will
be
a
whole
number
 c. because
the
scores
are
all
whole
numbers,
the
mode
will
be
a
whole
number*
 d. because
the
scores
are
all
whole
numbers,
the
mean
and
median
will
have
the
same
value
 e. all
of
the
above
are
correct
descriptions
 What
is
the
rationale
behind
using
n‐1
in
calculating
the
sample
standard
deviation
instead
of
 just
N?
 a. None,
you
can
use
either
equation
interchangeably

 b. n‐1
removes
any
potential
outliers
in
the
sample
which
could
exaggerate
the
variance
 c. n‐1
will
yield
a
larger
result,
which
is
a
better
reflection
of
the
standard
deviation
of
the
 population*
 d. n‐1
yields
a
smaller
result,
which
is
a
better
reflection
of
the
standard
deviation
of
the
 population
 e. Both
b
and
d
 
 
 
 
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 4
 
 6) The
value
of
one
score
in
a
distribution
is
changed
from
X
=
20
to
X
=
30.

Which
measure(s)
of
 central
tendency
is
(are)
certain
to
be
changed?
 a. the
mean*
 b. the
median
 c. the
mean
and
the
median
 d. the
mode
 e. cannot
determine
from
the
information
given
 7) Which
of
the
following
students
scored
highest
on
his/her
quiz
relative
to
the
other
students
 in
his/her
class?

(Each
of
the
five
students
took
quizzes
in
different
classes.)
 a. Allen:

Score
=
65.

Quiz
mean
=
80.

Z‐score
=
‐5.

 b. Barbara:

Score
=
42.

Quiz
mean
=
36.

Z‐score
=
+2.
 c. Chris:

Score
=
98.

Quiz
mean
=
81.

Z‐score
=
+1.
 d. Davina:

Score
=
64.

Quiz
mean

=
65.

Z‐score
=
‐1.
 e. Enrique:

Score
=
56.

Quiz
mean

=
40.

Z‐score
=
+4.*
 
 A
student
wants
to
know
the
proportion
of
students
who
scored
above
him
on
the
Psych
60
 final
exam.

Assume
the
scores
on
this
exam
are
normally
distributed.
Which
of
the
following
 information
does
this
student
NOT
need:
 a. the
number
of
students
in
the
class**
 b. the
mean
of
the
class
 c. the
standard
deviation
of
the
class
 d. the
student’s
own
score
 e. All
the
above
information
is
necessary
 
 Max
is
trying
to
estimate
the
number
of
hours
the
average
UCSD
student
has
spent
at
 Disneyland.

He
collects
data
from
a
small
sample
of
eight
students,
which
by
random
chance
 happens
to
include
one
student
whose
parents
both
worked
at
Disneyland
his
whole
life.

His
 data
is
as
follows
(in
hours):

4,
19,
0,
52,
19,
36,
2,
11231.

Based
on
these
data,
which
of
the
 following
measures
of
central
tendency
would
not
be
a
good
estimate
of
central
tendency?
 a. Mean*
 b. Median
 c. Mode
 d. A
measure
of
central
tendency
from
a
much
larger
sample.
 e. The
mean,
median,
and
mode
of
all
UCSD
students
 8) 9) 10) Twenty‐five
patients
are
taking
a
test
to
determine
if
they
have
a
particular
cognitive
disorder.
 One
definition
for
having
this
disorder
is
scoring
below
90%
of
the
population
on
a
particular
 cognitive
task.
The
population
mean
score
for
this
task
is
50,
with
a
standard
deviation
of
5.
In
 the
sample
of
25,
the
mean
score
on
the
task
is
45
with
a
standard
deviation
of
4.
In
the
 population,
performance
on
this
task
is
normally
distributed.
The
doctor
is
trying
to
 determine
at
what
score
he
should
diagnose
patients
with
this
disorder.
Help
him
by
 determining
approximately
what
score
should
be
used
for
the
diagnosis.
 a. 43.5
*
 b. 38.5
 c. 45
 d. 40

 e. cannot
determine
from
the
information
given
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 5
 
 
 11) A
population
of
scores
has
μ
=
44.
In
this
population,
a
score
of
X
=
40
corresponds
to
z
=
‐1.00.
 What
is
the
population
standard
deviation?
 a. 2
 b. 4*
 c. ‐2
 d. ‐4
 e. cannot
determine
from
the
information
given
 
 12) On
an
exam
with
a
mean
of
μ
=
70,
you
have
a
score
of
X
=
75.
Which
of
the
following
values
 for
the
standard
deviation
would
give
you
the
highest
position
within
the
class?
 a. σ
=
1*
 b. σ
=
5
 c. σ
=
10
 d. σ
=
70
 e. cannot
determine
from
the
information
given
 
 13) If
every
score
in
a
population
with
μ
=
60
and
σ
=
8
is
transformed
into
z‐scores,
then
the
 resulting
distribution
of
z‐scores
will
have
a
mean
of
____
and
a
standard
deviation
of
____.
 a. 0
and
1*
 b. 60
and
1
 c. 0
and
8
 d. 60
and
8
(unchanged)
 e. cannot
determine
from
the
information
given
 
 14) Under
what
circumstances
would
a
score
that
is
15
points
above
the
mean
be
considered
an
 extreme
score?
 a. when
the
population
mean
is
much
larger
than
15
 b. when
the
population
standard
deviation
is
much
larger
than
15
 c. when
the
population
mean
is
much
smaller
than
15
 d. when
the
population
consists
of
many
more
than
15
scores
 e. when
the
population
standard
deviation
is
much
smaller
than
15*
 
 15) You
are
investigating
how
good
UCSD
students
are
at
spelling
by
looking
at
a
sample
of
10
 students.
Your
measure
is
how
many
words
are
correctly
spelled
before
the
student
makes
a
 mistake.



Some
students
misspell
the
very
first
word,
while
the
majority
spell
between
5
and
 10
words
correctly
before
making
a
mistake.

One
student,
however,
who
was
a
former
 National
Spelling
Bee
contestant,
spells
89
words
correctly
without
making
a
mistake.

Which
 of
the
following
is
true
of
this
data
set?
 a. It
is
negatively
skewed
and
the
mean
is
greater
than
the
median.
 b. It
is
positively
skewed
and
the
mean
is
greater
than
the
median.
*
 c. It
is
negatively
skewed
and
the
mean
is
lower
than
the
median.
 d. It
is
negatively
skewed
and
the
mean
is
lower
than
the
median.
 e. Based
on
this
information,
it
is
impossible
to
tell
the
skew
and
whether
the
mean
or
the
 median
is
higher.
 
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 
 16) John
drives
to
work
each
morning
and
the
trip
takes
an
average
of
µ
=
38
minutes.

The
 distribution
of
driving
times
is
approximately
normal
with
a
standard
deviation
of
σ
=
5
 minutes.

For
a
randomly
selected
morning,
what
is
the
probability
that
John’s
drive
to
work
 will
take
between
36
and
40
minutes?
 a. 0.3446
 b. 0.3892
 c. 0.1554
 d. 0.6554
 e. 0.3108*
 
 17) Which
set
of
scores
has
the
smallest
standard
deviation?

 a. 11,
17,
31,
53,
64,
18,
23,
19
 b. 5,
11,
42,
22
 c. 145,
143,
145,
147*
 d. 27,
105
 e. Depends
on
whether
the
scores
represent
a
sample
or
a
population
 
 18) A
jar
contains
10
red
marbles
and
20
blue
marbles.
If
you
randomly
select
one
marble
from
 the
jar,
what
is
the
probability
of
getting
a
red
marble?
 a. 10/20
 b. 20/30
 c. 1/10
 d. 1/30
 e. 10/30*
 19) Unlike
the
mean,
the
median:
 a. is
a
statistic
only
used
when
the
data
are
interval/ratio
scale
 b. is
a
statistic
only
used
when
the
data
are
ordinal
 c. is
highly
insensitive
to
outliers*
 d. is
highly
sensitive
to
outliers
 e. Both
b
and
c
 20) A
recent
study
reports
that
increased
lighting
during
the
winter
months
results
in
lower
 depression
scores.
For
this
study,
what
is
the
dependent
variable?
 a. the
amount
of
light
 b. the
season
of
the
year
 c. the
level
of
depression*
 d. the
individuals
who
participated
in
the
study
 e. there
is
no
dependent
measure
in
this
type
of
study
 
 21) What
is
the
value
of
SS
for
the
following
sample?
 








Scores:
1,
3,
5
 a. SS
=
8*
 b. SS
=
8/2
 c. SS
=
8/3
 d. SS
=
(8)2
 e. SS
=
(8/2)2
 6
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 7
 
 22) What
is
the
shape
of
the
distribution
for
the
following
set
of
data?
 
















1,
1,
2,
2,
2,
2,
3,
3,
7,
8
 a. symmetric
 b. positively
skewed*
 c. negatively
skewed
 d. cumulative
 e. cannot
determine
from
the
information
given
 
 23) In
experimental
methods,
what
is
the
proper
name
of
the
variables
that
are
manipulated?
 a. independent
variables*
 b. extraneous
variables
 c. dependent
variables
 d. control
variables
 e. manipulated
variables
 
 24) A
researcher
investigating
how
stubbing
one’s
toe
causes
anger
chooses
to
measure
the
anger
 his
subjects
express
as
the
number
of
times
they
swear
after
stubbing
their
toes.
This
 researcher’s
choice
to
measure
“anger”
this
way
is
his:
 a. construct
definition
 b. measurement
definition
 c. discrete
definition
 d. operational
definition*
 e. scale
definition
 
 25) For
the
following
distribution,
how
many
people
had
a
score
between
40
and
50?
 a. 10
 
 
 
 
 
 
 
 X




 



f
 b. 14
 
 
 
 
 
 
 
 60‐74
 



2
 
 c. 12
 
 
 
 
 
 
 
 45‐59
 



14
 
 d. 7
 
 
 
 
 
 
 
 30‐44
 



10
 
 e. cannot
determine
from
the
information
given*


 15‐29
 



7
 
 26) What
additional
information
is
obtained
by
measuring
on
an
interval
scale
compared
to
an
 ordinal
scale?
 a. whether
the
measurements
are
the
same
or
different
 b. the
direction
of
the
differences
 c. the
size
of
the
differences*
 d. Whether
the
scale
has
a
true
zero
point
 e. None
of
the
above
 
 27) What
value
will
you
obtain
if
you
add
all
the
deviation
scores
for
a
dataset,
and
then
divide
 that
sum
by
the
number
of
scores
in
the
dataset?
 a. the
sample
variance
 b. the
population
variance
 c. you
will
always
get
one
 d. you
will
always
get
zero*
 e. depends
on
whether
the
data
are
being
used
as
a
population
of
a
sample
 
 Psychology
60
–
Spring,
2010
–
Midterm1
–
Given
4/20/10
 8
 
 28) The
average
verbal
SAT
score
for
the
entire
class
of
entering
freshmen
is
530.
However,
if
you
 select
a
sample
of
20
freshmen
and
compute
their
average
verbal
SAT
score,
you
probably
will
 not
get
exactly
530.
What
statistical
concept
is
used
to
explain
the
natural
difference
that
 exists
between
a
sample
mean
and
the
corresponding
population
mean?
 a. statistical
error
 b. inferential
error
 c. sampling
error*
 d. parametric
error
 e. variable
error
 
 
 
 
 
 
 Make
sure
you
bubbled
in
correctly
which
Test
Form
you
were
taking.

 We
cannot
score
your
exam
without
this!
Before
continuing,
check
that
you
have
done
this.
 
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