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PSY 335 Interpreting Statistics Worksheet Guidelines and Rubric
In order for psychologists to conduct effective assessments, they must interpret test data. This assignment provides you an opportunity to analyze two sets of
data and practice interpreting them. This assignment is intended as a review of descriptive statistics and correlation—a refresher to set the stage for
understanding how these concepts will be applied in future modules, to understand what the scores represent, and to be able to summarize the data in a
meaningful way.
Prompt: The included data set contains two sets of data—Verbal IQ test scores and Reading test scores, along with descriptive statistics for each variable and
correlation data comparing the two variables. Please answer the following questions in the space provided in the Interpreting Statistics Worksheet. In the Interpreting Statistics Worksheet, the following critical elements, specifically, must be addressed:
I. Using the provided data and graphs, describe the frequency distribution for the IQ test:
a) What is a typical score for this sample?
b) How variable are the scores?
c) How are the scores distributed?
II. Using the provided data and graphs, describe the frequency distribution of the reading test scores:
a) What is a typical score for this sample?
b) How variable are the scores?
c) How are the scores distributed?
III. Consider the correlation data given the provided data and graph:
a) How are IQ and reading achievement related?
IV. Evaluate the data from a psychological testing perspective.
a) Are these samples good representations of the general population? How do you know?
b) What could you do to make them a more representative sample?
c) How would you interpret the correlation results?
d) What are some ways this knowledge of their relationship could be used?
Rubric
Guidelines for Submission: Your one- to two-page worksheet must be submitted using the Interpreting Statistics Worksheet. Cite any sources using APA format.
Critical Elements Exemplary (100%) Proficient (85%) Needs Improvement (55%) Not Evident (0%) Value
Frequency
Distribution: IQ Test
Meets “Proficient” criteria, and
response contains no errors and
is logical and informed by
statistical knowledge
Correctly describes typical
score, variable of score, and
score distribution of IQ Test
data set; minor errors present;
response is logical and
demonstrates statistical
knowledge
Describes typical score, variable
of score, and score distribution
of IQ Test data set, but response
is illogical or overlooks key
statistical facets; response is
also incorrect, missing, or
containing illogical conclusions
Does not describe typical score,
variable of score, or score
distribution of IQ Test data set
15
Frequency
Distribution: Reading
Test Scores
Meets “Proficient” criteria and
response contains no errors and
is logical and informed by
statistical knowledge
Correctly describes typical
score, variable of score, and
score distribution of Reading
Test data set; response is logical
and demonstrates statistical
knowledge
Describes typical score, variable
of score, and score distribution
of Reading Test data set, but
response is illogical or overlooks
key statistical facets; response is
also incorrect, missing, or
containing illogical conclusions
Does not describe typical score,
variable of score, or score
distribution of Reading Test
data set
15
Correlation Data Meets “Proficient” criteria and
supports correlation with
scholarly research and
examples
Correctly relates results of IQ
and Reading Test scores by
using relevant psychological
methodology
Relates results of IQ and
Reading Test scores by using
relevant psychological
methodology, but correlation is
illogical or overlooks key
components
Does not relate results of IQ
and Reading Test scores
20
Evaluate the Data Meets “Proficient” criteria and
strengthens conclusions with
examples from scholarly
research
Draws informed conclusions
regarding representations,
samples, and relationships
within data sets
Draws conclusions regarding
representations, samples, and
relationships within data sets,
but correlation is illogical or
overlooks key aspects
Does not draw conclusions
regarding representations,
samples, and relationships
within data sets
40
Articulation of
Response
Submission is free of errors
related to citations, grammar,
spelling, syntax, and
organization and is presented in
a professional and easy-to-read
format
Submission has no major errors
related to citations, grammar,
spelling, syntax, or organization
Submission has major errors
related to citations, grammar,
spelling, syntax, or organization
that negatively impact
readability and articulation of
main ideas
Submission has critical errors
related to citations, grammar,
spelling, syntax, or organization
that prevent understanding of
ideas
10
Earned Total 100%

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