PSY520 Graduate
Statistics
Week 1
Discussion
DQ1 Review the levels of measurement terms
in the Statistics Visual Learner media piece. Compare and contrast Stevens's
four scales of measurement, and explain when each type of scale should be used.
DQ2 The professor teaching a large
introductory class gives a final exam that has alternate forms, A, B, and C. A
student taking the exam using Form B is upset because she claims that Form B is
much harder than Forms A and C. Discuss how percentile point data might be
useful to determine if the student is correct.
PSY520 Graduate
Statistics
Week 2
Discussion
DQ1 The process of random sampling
guarantees that the sample selected will be representative of the population.
Is this statement true? Discuss.
DQ2 Review the video on Normal Distribution
in the Calculations section of the "Statistics Visual Learner" media
piece.
Bob compares his SAT Verbal score of 400 to
Marge's ACT Verbal score of 20. "I beat you," he exclaims. "My
score is 20 times your score!" Although his multiplication is good, his
logic is faulty. Explain why.
PSY520 Graduate
Statistics
Week 3
Discussion
DQ1 Review the video "Linear
Correlation" in the Calculations section of the "Statistics Visual
Learner" media piece.
It is sometimes said that the higher the
correlation between two variables, the more likely the relationship is causal.
Do you think this is correct? Discuss.
DQ2 Discuss the strengths and weaknesses of
correlational and regression studies; discuss concepts such as positive and
negative correlations, correlation coefficients, confounding, and causality.
PSY520 Graduate
Statistics
Week 4
Discussion
DQ1 Explain why there is an inverse
relationship between committing a Type I error and committing a Type II error.
What is the best way to reduce both kinds of error?
DQ2 Review the term Significance Test in
the "Statistics Visual Learner" media piece.
When a newspaper or magazine article
reports the results of a study and draws a conclusion without also reporting
whether the results are statistically significant, what are the possible
reasons for doing so? How seriously should you take the conclusion offered in
such a study? Discuss.
PSY520 Graduate
Statistics
Week 5
Discussion
DQ1 Explain why using the t statistic may
be an appropriate alternative to using a z-score (use the concept of estimated
standard error to justify your answer).
DQ2 Discuss how the t-test for correlated
groups and the t-test for single samples are alike and different.
PSY520 Graduate
Statistics
Week 6
Discussion
DQ1 Review the four "ANOVA"
videos in the Calculations section of the "Statistics Visual Learner"
media piece.
Explain the major differences between
analyzing a one-way ANOVA versus a two-factor ANOVA, and explain why factorial
designs with two or more independent variables (or factors) can become very
difficult to interpret.
DQ2 plain how the ANOVA technique avoids
the problem of the inflated probability of making Type I error that would arise
using the alternative method of comparing groups two at a time using the t-test
for independent groups.
PSY520 Graduate
Statistics
Week 7
Discussion
DQ1 Review the three
"Non-parametric" test videos in the Calculations section of the
"Statistics Visual Learner" media piece.
A researcher is examining preferences among
four new flavors of ice cream. A sample of n = 80 people is obtained. Each
person tastes all four flavors and then picks a favorite. The distribution of
preferences is as follows. Do these data indicate any significance preferences
among the four flavors? Test at the .05 level of significance.
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Ice Cream Flavor
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A
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B
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C
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D
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12
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18
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28
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22
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DQ2 Is it true that parametric tests are
generally more powerful than nonparametric tests? If so, give two reasons why
you might choose to use a nonparametric test instead of a parametric test.
PSY520 Graduate
Statistics
Week 8
Discussion
DQ1 To determine whether a new sleeping
pill has an effect that varies with dosage, a researcher randomly assigns adult
insomniacs, in equal numbers, to receive either 4 or 8 grams of the sleeping
pill. The amount of sleeping time is measured for each subject during an 8-hour
period after the administration of the dosage. What type of design is this, and
what type of statistic is needed to analyze the data?
DQ2 Dr. Bill Board designs a 2 X 2
between-subjects factorial design, where Factor A is word frequency (low or
high) and Factor B is category cues (no cues or cues). Assume that the data are
interval. What type of statistic is needed to analyze the data?
PSY520 Graduate
Statistics
Week 1 Exercises
Complete the following exercises from
"Review Questions" located at the end of each chapter and put them
into a Word document to be submitted as directed by the instructor.
Chapter 1, numbers 1.8 and 1.9
Chapter 2, numbers 2.14, 2.17, and 2.18
Chapter 3, numbers 3.13, 3.14, 3.18, and
3.19
Chapter 4, numbers 4.9, 4.14, 4.17, and
4.19
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
PSY520 Graduate
Statistics
Week 2 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 5, numbers 5.11, 5.13, 5.15, and
5.18
Chapter 8, numbers 8.10, 8.14, 8.16, 8.19,
and 8.21
PSY520 Graduate
Statistics
Week 3 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 6, numbers 6.7, 6.10, and 6.11
Chapter 7, numbers 7.8, 7.10, and 7.13
PSY520 Graduate
Statistics
Week 4 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 9, numbers 9.7, 9.8, 9.9, 9.13, and
9.14
Chapter 10, numbers 10.9, 10.10, 10.11, and
10.12
Chapter 11, numbers 11.11, 11.19, and 11.20
Chapter 12, numbers 12.7, 12.8, and 12.10
PSY520 Graduate
Statistics
Week 5 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 13, numbers 13.6, 13.8, 13.9, and
13.10
Chapter 14, numbers 14.11, 14.12, and 14.14
Chapter 15, numbers 15.7, 15.8, 15.10 and
15.14
PSY520 Graduate
Statistics
Week 6 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 16, numbers 16.9, 16.10, 16.12 and
16.14
Chapter 17, numbers 17.6, 17.7, and 17.8
Chapter 18, numbers 18.8, 18.11, and 18.12
PSY520 Graduate
Statistics
Week 7 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 19, numbers 19.9, 19.10, 19.13,
19.14, and 19.16
Chapter 20, numbers 20.5, 20.6, 20.7, and
20.10
PSY520 Graduate
Statistics
Week 8 Exercises
Complete the following exercises located at
the end of each chapter and put them into a Word document to be submitted as
directed by the instructor.
Show all relevant work; use the equation
editor in Microsoft Word when necessary.
Chapter 21, numbers 21.4, 21.7, 21.8, 21.12
thru 21.21
PSY520 Graduate
Statistics
Week 1 Assignment
Descriptive Statistics Project
Use the attached document “Descriptive
Statistic Project” to complete the assignment.
While APA format is not required for the
body of this assignment, solid academic writing is expected, and documentation
of sources should be presented using APA formatting guidelines, which can be
found in the APA Style Guide, located in the Student Success Center.
Topic 1 – Descriptive Statistics Project
Directions:
Use the following information to complete the questions below. While APA format
is not required for the body of this assignment, solid academic writing is
expected, and documentation of sources should be presented using APA formatting
guidelines, which can be found in the APA Style Guide, located in the Student
Success Center.
A researcher was interested in the
anxiety present in students just prior to the midterm exam. The research used
an anxiety self-quiz to gage the student’s anxiety. The score for 30 students
are given here.
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69
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99
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91
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66
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70
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98
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70
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53
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40
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58
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61
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66
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94
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77
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70
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56
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88
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85
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86
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40
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84
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86
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54
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48
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86
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43
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78
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53
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79
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89
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1. Construct
a frequency table with class, frequency, relative percent, and cumulative
percent that has 6 classes to describe the distribution of the data in SPSS.
2. Use
the frequency table created in problem to construct a histogram in SPSS.
3. Use
SPSS to calculate the numerical descriptive statistics mean, median, standard
deviation, and variance of the anxiety scores.
PSY520 Graduate
Statistics
Week 3 Assignment
Probability Project
Use the document “Probability Project” to
complete the assignment.
While APA format is not required for the
body of this assignment, solid academic writing is expected, and documentation
of sources should be presented using APA formatting guidelines, which can be
found in the APA Style Guide, located in the Student Success Center.
Topic 3 – Probability Project
Directions:
Use the following information to complete the assignment. While APA format is
not required for the body of this assignment, solid academic writing is
expected, and documentation of sources should be presented using APA formatting
guidelines, which can be found in the APA Style Guide, located in the Student
Success Center.
There are many misconceptions about
probability which may include the following.
·
All
events are equally likely
·
Later
events may be affected by or compensate for earlier ones
·
When
determining probability from statistical data, sample size is irrelevant
·
Results
of games of skill are unaffected by the nature of the participants
·
“Lucky/Unlucky”
numbers can influence random events
·
In
random event involving selection, results are dependent on number rather than
rations
·
If
events are random then the results of a series of independent events are
equally likely
The following statements are all
incorrect. Explain the statements and the errors fully using the probability
rules discussed in topic two.
1. I
have flipped and unbiased coin three times and got heads, it is more likely to
get tails the next time I flip it.
2. The
Rovers play Mustangs. The Rovers can win, loose, or draw, so the probability
that they win is 1/3.
3. I
roll two dice and ad the results. The probability of getting a total of 6 is
1/12 because there are 12 different possibilities and 6 is one of them.
4. Mr.
Purple has to have a major operation. 90% of the people who have this operation
make a complete recovery. There is a 90% chance that Mr. Purple will make a
complete recovery if he has this operation.
5. I
flip two coins. The probability of getting heads and tails is 1/3 because I can
get Heads and Heads, Heads and Tails, or Tails and Tails.
6. 13
is an unlucky number so you are less likely to win raffles with ticket number
13 than with a different dumber.
PSY520 Graduate
Statistics
Week 5
Assignment
Use the attached document “Correlation
and Regression” to complete the assignment.
While APA format is not required for the
body of this assignment, solid academic writing is expected, and documentation
of sources should be presented using APA formatting guidelines, which can be
found in the APA Style Guide, located in the Student Success Center.
This benchmark assignment assesses the
following programmatic competencies: 3.1 Interpret psychological phenomena
using scientific reasoning.
PSY-520 Graduate Statistics
Topic 5 – Benchmark – Correlation and
Regression Project
Directions: Use the following
information to complete the questions below. While APA format is not required
for the body of this assignment, solid academic writing is expected, and
documentation of sources should be presented using APA formatting guidelines,
which can be found in the APA Style Guide, located in the Student Success
Center.
1. Select
at least three variables that you believe have a linear relationship.
a. Specify
how you will measure each of these variables (i.e., what instrument will you
use and provide an APA reference for the instrument)
2. Collect
the data for these variables and describe the data collection technique and why
it was appropriate as well as why the sample size was best.
a. Submit
the data collected by submitting the SPSS data file with your submission.
3. Find
the Correlation coefficient for each of the possible pairings of variables and
describe the relationship in terms of strength and direction.
4. Find
a linear model of the relationship between the three (or more) variables of
interest. Identify the predictor variables and the criterion variable.
5. Provide
an output of the SPSS results and interpret the results using correct APA
style.
This benchmark assignment assesses the
following programmatic competencies: 3.1: Interpret psychological phenomena
using scientific reasoning
PSY520 Graduate
Statistics
Week 7 Assignment
MANOVA Project
Use the attached document “MANOVA Project”
to complete this assignment.
While APA format is not required for the
body of this assignment, solid academic writing is expected, and documentation
of sources should be presented using APA formatting guidelines, which can be
found in the APA Style Guide, located in the Student Success Center.
Topic 7 – MANOVA Project
Directions: Use the following
information to complete the assignment. While APA format is not required for
the body of this assignment, solid academic writing is expected, and
documentation of sources should be presented using APA formatting guidelines,
which can be found in the APA Style Guide, located in the Student Success
Center.
A researcher randomly assigns 33
subjects to one of three groups. Group 1 receives technical dietary information
interactively from an on-line website. Group 2 receives the same information
from a nurse practitioner, while Group 3 receives the information from a video
tape made by the same nurse practitioner.
The researcher looked at three different
ratings of the presentation; difficulty, usefulness, and importance to
determine if there is a difference in the modes of presentation. In particular,
the researcher is interested in whether the interactive website is superior
because that is the most cost-effective way of delivering the information.
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Group
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Usefulness
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Difficulty
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Importance
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1
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20
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5
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18
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1
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25
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9
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8
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1
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23
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15
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20
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1
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16
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9
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22
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1
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20
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6
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22
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1
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28
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14
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8
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1
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20
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6
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13
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1
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25
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8
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13
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1
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24
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10
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24
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1
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18
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10
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20
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1
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17
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9
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4
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2
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28
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7
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14
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2
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25
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14
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5
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2
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26
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9
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20
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2
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19
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15
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22
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2
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29
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14
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12
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2
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15
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6
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2
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2
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29
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10
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5
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2
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26
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11
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1
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2
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22
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5
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2
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2
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15
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15
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14
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2
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29
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6
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4
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2
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15
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6
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3
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3
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22
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8
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12
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3
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27
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9
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14
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3
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21
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10
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7
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3
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17
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9
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1
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3
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16
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7
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12
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3
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19
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9
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7
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3
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23
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10
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1
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3
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27
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9
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5
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3
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23
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9
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6
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3
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16
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14
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22
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1. Run
the appropriate analysis of the data and interpret the results.
2. How
could this study have been done differently? Why or why not would this approach
be better?
PSY520 Graduate
Statistics
Week 8 Assignment
Research Question Project
In 1,250-1,500 words, answer the following
questions about possible research options.
Create a research question in the field of
psychology that you are interested in researching. Write questions clearly.
Include a brief background of the problem you are proposing and why it is
important to the field of psychology.
State the null and alternative hypothesis
(in both words and statistical notation) need to address the research question.
Choose which statistical test would be used
to conduct the study and support it with research.
Describe the type of data needs to be
collected to conduct the study and what techniques are best for collecting
data.
Use three to five scholarly resources to
support your explanations.
Prepare this assignment according to the
guidelines found in the APA Style Guide, located in the Student Success Center.
An abstract is not required.
This assignment uses a rubric. Please
review the rubric prior to beginning the assignment to become familiar with the
expectations for successful completion.
You are required to submit this assignment
to LopesWrite. Please refer to the directions in the Student Success Center.
