EPY 6214 Exam I FA 2022Question
1
2
3
4
5
6
Bonus
Total
/12
/15
/18
/18
/18
/18
/5
/105
Score
Dataset: Breast_Cancer_Survey.sav
Codebook for Exam Data
Variable
Age
Race
GPA
Marital
Education
Insurance
Screen
Knowledge_Pre
Knowledge_Post
Suscep_Sever
Benefit
Barriers
Values
Participants’ actual age.
1=Caucasian, 2=Black, 3=Hispanic, 4=Asian, 5=Other
Grade Point Average
1=Married, 2=Divorced/Separated, 3=Widowed, 4=Single
1=High school or below, 2=College or above
1=Yes, 2=No
Mammogram, 1=Yes, 2=No
Breast cancer related score, higher score indicates higher
level of knowledge
Perceived susceptibility and severity pertaining to the
perceived disruption caused by breast cancer, higher score
indicates higher level of perceived susceptibility and severity.
Perceived benefits associated with early detection of breast
cancer. Higher score indicates great benefit to breast cancer
screening.
Barriers to receive mammography exam. Higher scores reflect
higher perceived barriers to mammography screening.
EPY 6214 Exam I FA 2022
1. Answer the following three questions. (12 points)
(1) Please define or draw a figure representing population distribution, sample
distribution, and sampling distribution (6 points)
(2) Please define, compare and contrast the standard deviation and standard
error. (6 point)
EPY 6214 Exam I FA 2022
2. Using the dataset: “Breast_Cancer_Survey.sav” to generate a frequency table
for “Benefit” variable. (total 15 points. Fill the table for 5 points).
Score
Frequency
(f)
Cumulative
Frequency
(cf)
Proportion
(p)
Percentage
(p%)
Cumulative
Percentage
(c%)
1.00-2.00
2.01-3.00
3.01-4.00
4.01-5.00
a. Using the SPSS, create a graph for the distribution of the “Benefit” variable (4
points).
b. Using the SPSS, what are the mean, median, mode, variance, std, and range for
“Benefit” variable (6 points, include your SPSS output and report the results)?
EPY 6214 Exam I FA 2022
3. Using the same dataset (“Breast_Cancer_Survey.sav”). Assuming Knowledge
is a standardize test. Assuming that the population mean for the Knowledge
equals to 6.35 and population standard deviation equal to 1 (variables:
“Knowledge_Pre”). Do the participants in this dataset had a higher level of
Knowledge pre-test scores compare to the general population? (Set significant
level at .05) (18 points total)
(1) Ho:
___________________________________________________ (1 point)
(2) Ha:
___________________________________________________ (1 point)
(3) What is the appropriate statistical test/procedure? (2 points)
______________________________________________________________________
(4) Conduct a data analysis if needed (SPSS output for 2 points, copy-paste under
this question).
(5) Report the results here, including the test statistic from the output or your
calculation (such as z, t, F statistics), the degrees of freedom (if needed), and
p-value (or critical value). (4 points)
______________________________________________________________________
(6) What is your decision about null hypothesis (reject/fail to reject the null and
provide evidence/reason(s) to support your decision) and your interpretations
(which score is higher, etc.)? (4 points)
______________________________________________________________________
(7) Compute the Cohen’s d effect size for this study. Remember to indicate if it is a
large, moderate, or small effect size. (4 points)
EPY 6214 Exam I FA 2022
4. Using the same dataset (“Breast_Cancer_Survey.sav”). Is there any statistically
significant differences on participant’s perceived benefit score between two
different educational level? (Variable: “Benefit” & “Eduation”)? (18 points)
(1) What is the appropriate statistical test/procedure? (2 points)
______________________________________________________________________
(2) Conduct a data analysis if needed (SPSS output for 2 points, copy-paste under
this question).
(3) Report the results here, including the value of the statistic from the output
or your calculation (such as z, t, F statistics), the degrees of freedom (if
needed), and p-value (or critical value). (4 points)
______________________________________________________________________
(4) What is your decision about null hypothesis (reject/fail to reject the null and
provide evidence/reason(s) to support your decision) and your
interpretations? (6 points)
______________________________________________________________________
(5) Compute the Cohen’s d effect size for this study. Remember to indicate if it is a
large, moderate, or small effect size. (4 points)
EPY 6214 Exam I FA 2022
5. Using the same dataset (“Breast_Cancer_Survey.sav”). Did the participants in
this sample had higher level of perceived barriers compared to the value of 3.35?
(Variable: “Barriers”). (18 points)
(1) What is the appropriate statistical test/procedure? (2 points)
______________________________________________________________________
(2) Conduct a data analysis if needed (SPSS output for 2 points, copy-paste under
this question).
(3) Report the results here, including the value of the statistic from the output
or your calculation (such as z, t, F statistics), the degrees of freedom (if
needed), and p-value (or critical value). (4 points)
______________________________________________________________________
(4) What is your decision about null hypothesis (reject/fail to reject the null and
provide evidence/reason(s) to support your decision) and your
interpretations? (6 points)
______________________________________________________________________
(5) Compute the Cohen’s d effect size for this study. Remember to indicate if it is a
large, moderate, or small effect size. (4 points)
EPY 6214 Exam I FA 2022
6. Using the same dataset (“Breast_Cancer_Survey.sav”). Did participants
knowledge score improve after the educational workshop? (Variable:
Knowledge_Pre & Knowledge_Post) (18 points)
(1) What is the appropriate statistical test/procedure? (2 points)
______________________________________________________________________
(2) Conduct a data analysis if needed (SPSS output for 2 points, copy-paste
under this question).
(3) Report the results here, including the value of the statistic from the
output or your calculation (such as z, t, F statistics), the degrees of
freedom (if needed), and p-value (or critical value). (4 points)
______________________________________________________________________
(4) What is your decision about null hypothesis (reject/fail to reject the null and
provide evidence/reason(s) to support your decision) and your
interpretations? (6 points)
______________________________________________________________________
(5) Compute the Cohen’s d effect size for this study. Remember to indicate if it
is a large, moderate, or small effect size. (4 points)
EPY 6214 Exam I FA 2022
Bonus Question (5 points):
Psychic is defined as relating to or denoting faculties or phenomena that are apparently
inexplicable by natural laws, especially involving telepathy or clairvoyance. One
psychologist would like to investigate this “Psychic” phenomena. He assumed that if a
person is “psychic”, he or she would be able to guess the color coat of the M&Ms
chocolate correctly when he or she was blindfolded. If a person is not “psychic”, he or
she would guess the color coat of the M&Ms no more than just by randomly guessing.
He conducted an experiment using 20 participants. Each participant pick 12 M&M
chocolate from the bag without seeing them, and guess what color they were. He
recorded the number of each participants’ correct guess. Here is the data from his
experiment.
2, 2, 3, 4, 5, 1, 0, 2, 2, 0, 3, 2, 0, 1, 3, 1, 4, 4, 3, and 3 (n=20)
(1) Suppose there are six different colors for each pack of M&M chocolate. What is
the probability for participants to guess the color correctly for each M&M
chocolate?
(2) Each participant pick 12 M&M chocolates from the bag. What is the test value (if
the participants were not “psychic” and guess the color just by random)?
(3) What kind of data analysis method would be appropriate for analyzing the data?
(4) Using SPSS to conduct the data analysis. What is the result? (provide your
output at the end of this question.)
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