hw2 - 
 Homework
Assignment
2
 Psychology
60
...

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Unformatted text preview: 
 Homework
Assignment
2
 Psychology
60
 Spring
2010
 
 
 
 General
Instructions:
 ‐ Make
sure
your
homework
has
written
on
it:
 o YOUR
NAME
 o YOUR
STUDENT
ID
 o YOUR
TA’S
NAME
(you
can
find
this
on
the
syllabus)
 
 ‐ Please
be
sure
your
homework
answers
are
LEGIBLE.
 
 ‐ For
homework
problems
requiring
calculation,
you
must
show
all
of
your
work,
including
 intermediate
steps,
in
order
to
receive
credit.


 ‐ Please
circle
final
answers
to
problems
that
require
computation;
doing
this
will
make
sure
 we
can
find
your
final
answer.

 ‐ For
questions
requiring
a
short
written
answer,
be
as
concise
as
possible
while
still
 explaining
your
answer.

 
 ‐ If
you
have
questions
about
concepts,
feel
free
to
post
questions
on
the
class
discussion
 board.
You
may
also
email
your
TAs,
but
do
so
only
after
you
have
looked
through
the
book
 for
an
answer
to
your
question.

 ‐ Homework
is
due
at
the
start
of
class
on
Tuesday
(by
11:15).
No
late
homework
will
be
 accepted.
 
 
 
 1. Use
summation
notation
to
express
each
of
the
following
calculations:
 a. Square
each
score,
then
add
the
squared
values.
 b. Add
the
scores,
then
square
the
sum.
 c. Add
two
points
to
each
score,
then
add
the
resulting
values.
 d. Add
the
scores,
then
subtract
6
points
from
the
total.
 
 2. Construct
a
grouped
frequency
distribution
table
to
organize
the
following
set
of
scores,
 which
range
from
88
to
470.
 319,

 241,

 104,
 165,

 97,

 452,

 280,
 
 88,
 225,
 396,
 271,
 233,
 470,
 356,
 159,
 266,
 112,
 293,
 174,
 268,
 153
 
 3. Line
charts
are
sometimes
used
incorrectly
to
display
data
that
should
be
presented
in
a
bar
 chart.
For
example,
the
following
line
chart
is
an
incorrect
way
to
show
the
average
GPA
in
 five
different
majors
at
UCSD.
Explain
in
your
own
words
why
a
line
chart
is
inappropriate
 for
data
such
as
these.


 3.125 3.1 3.075 GPA vs. Major Legend GPA GPA 3.05 3.025 3 2.975 Film History Mathematics Major Psychology Sociology 
 
 4. Come
up
with
a
hypothetical
data
example
in
which
the
use
of
a
scatter
plot
would
be
a
 correct
way
to
visualize
data.
You
do
not
need
to
produce
hypothetical
data,
only
a
situation
 and
the
names
of
the
variables
you
would
measure.

 
 5. Sketch
a
histogram
showing
the
distribution
of
scores
presented
in
the
following
table:
 
 X
 5
 4
 3
 2
 1
 f
 1
 5
 6
 3
 2
 
 6. An
instructor
at
the
state
college
recorded
the
academic
major
for
each
student
in
a
 psychology
class.
Construct
a
frequency
distribution
table
for
the
following
results:
 
 
 
 
 
 
 
 Psych
 
 Heath
 
 Soc
 
 Hist
 
 Nurs
 
 Bio
 
 Phys
Ed
 Health

 Psych
 
 Soc
 
 Soc
 
 Psych
 
 Psych
 
 Art
 
 Psych
 
 Engl
 
 Art
 
 Phys
Ed
 Health

 Psych
 
 Psych
 Psych
 Soc
 Psych
 Pol
Sci
 7. A
population
of
N
=
25
scores
has
a
mean,
μ
=
10.

What
is
the
value
of
∑Xi
for
this
 population?
 
 8. Does
it
ever
seem
to
you
that
the
weather
is
nice
during
the
work
week,
but
lousy
on
the
 weekend?

Cerveny
and
Balling
(1988)
have
confirmed
that
this
is
not
your
imagination
–
 pollution
accumulating
during
the
work
week
most
likely
spoils
the
weekend
weather
for
 people
on
the
Atlantic
coast.

Consider
the
following
hypothetical
data
showing
the
daily
 amount
of
rainfall
for
10
weeks
during
the
summer.
 
 
 Week
 1
 Av.
Daily
Rainfall
 Weekdays
(M
–
F)
 1.2
 Av.
Daily
Rainfall
 Weekends
(Sat.
/
Sun.)
 1.5
 2
 3
 4
 5
 6
 7
 8
 9
 10
 
 0.6
 0.0
 1.6
 0.8
 2.1
 0.2
 0.9
 1.1
 1.4
 2.0
 1.8
 1.5
 2.2
 2.4
 0.8
 1.6
 1.2
 1.7
 
 
 a. Calculate
the
average
daily
rainfall
(the
mean)
during
the
week,
and
the
average
daily
 rainfall
for
the
weekends.
 b. Based
on
the
two
means,
does
there
appear
to
be
a
pattern
in
the
data?
 
 9. Find
mean,
median,
and
mode
for
the
following
sample
of
scores:
 7,
5,
9,
7,
7,
8,
6,
8,
10,
7,
4,
6
 
 ...
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This note was uploaded on 07/26/2010 for the course PSYC PSYC 60 taught by Professor ? during the Spring '09 term at UCSD.

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