PSYC 354 Homework 2 Frequency Tables and Graphs
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All Questions
Part I: Concepts
These questions are based on the Nolan and Heinzen reading and end-of-chapter questions.
Use the following table to
answer Question
1. This table depicts the scores of 83 students
on an exam worth 65 points.
1) Use
the information
in the table to determine
the percentages for
each interval. Depending on your rounding decisions, these may or may not add up to exactly 100% but should be very close.
Table: Grouped Frequency Table
Exam score
|
Frequency
|
|
60–62
|
3
|
|
57–59
|
9
|
|
54–56
|
21
|
|
51–53
|
18
|
|
48–50
|
14
|
|
45–47
|
10
|
|
42–44
|
8
|
|
TOTAL
|
83
|
|
2) When constructing
a histogram
and labeling the
x-
and y-axes,
the lowest number on each axis should ideally be ……
3)
A
frequency distribution that is bell-shaped, symmetrical,
and unimodal is
4)
A
frequency distribution that has a tail trailing off to
the
right of the distribution
is
5) A frequency distribution
of ages
of residents
at a senior citizen
home is clustered around 83 with a long tail to the left. This distribution is
6) When a variable cannot
take on values above a certain level,
this is known as a(n) effect.
7) A grouped frequency table
has
the following intervals: 30–44,
45–59, and 60–74. If converted
into a histogram,
what would the midpoints
be?
8) Do
the
data
below show a
linear relation, non-linear relation,
or
no relation at all?
9) Do the data below show a linear relation,
non-linear relation, or no relation at all?
Part I:
Question 10a-
10e
· Read
the
introduction and
click on different “subway lines” to see how the interactive
graph
works.
10-a) In
which
of the four boroughs
is
the median household income highest?
10-b) Click on
the
“A”
line. Does the line
graph for Manhattan show high or low variability?
What
does this
level of variability tell us about the household income in
this area
of
Manhattan?
10-c)
Click on
line 2. Which borough (not a street)
shows the least variability in
median
household income?
10-d) On
line 2, find the following two
subway stops: Park Place (the first of the
highest Manhattan
stops) and
E 180 St. (one of the lowest Bronx
stops, located
about halfway across the
BRX
section). What is the
difference
(calculate) between the median household incomes of the two
areas?
10-e)
Click on
the “D” line. Which subway stop in Brooklyn
seems
to be an outlier?
Part II:
SPSS Analysis
Green and Salkind, Lesson 20
· Open the
“Lesson 20 Exercise File 1” document (found in the course’s Assignment Instructions folder) in order
to complete these exercises.
· Always use the Blackboard
files instead of the files on the Green and Salkind website as some files have been modified for the purposes of this course.
· Reminder: For Exercise
1,
be sure to paste in the
SPSS output and write out the answers for A, B, and C beneath
it.
Part III:
SPSS Data Entry and Analysis
The steps will be the
same in Part III as the ones you have been practicing in Part I of the
assignment; the
only difference
is that you are now responsible
for
creating the data file as well. Remember to do the following:
· Name and define your variables under the
“Variable View,” then return to the “Data View” to
enter the data;
and
· Paste all SPSS output and graphs into
your homework file at the appropriate place.
Part III: Questions 1a-1c
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