For this essay, critique the results and interpretation of a correlational study.
In this essay, demonstrate your ability to organize data into
meaningful sets, calculate basic descriptive statistics, interpret the
results, and evaluate the effects of outliers and changes in the
variables. You may use Excel, one of the many free online descriptive
statistics calculators, or calculate the values by hand and/or with a
Next, separate the data into two groups of 10; one group will be the
lower reaction times, and the second group will be the higher reaction
times. Then, address the following points in your essay response:
- Calculate the sum, mean, mode, median, standard deviation, range, skew, and kurtosis for each group.
- How do the two groups differ?
- Are there any outliers in either data group?
- What effect does an outlier have on a sample?
Lastly, double each sample by repeating the same 10 data points in
each group. You will have a total of 20 data points for each group.
After completing this, address the following in your essay response:
- Calculate the following for the new data groups: sum, mean, mode, median, standard deviation, range, skew, and kurtosis.
- Did any of the values change?
- How does sample size affect those values?
Part II: Research Study Critique
You will identify and
critically evaluate a quantitative research article based on a social
science topic. Your selected article must include a research
question(s) and/or hypothesis(es) and utilize statistical analyses
covered in the course. The article must be peer-reviewed and published
within the last 10 years.
In the body of your critique, describe the statistical approaches used,
the variables included, the hypothesis(es) proposed, and the
interpretation of the results. In your conclusion, suggest other
statistical approaches that could have been used and, if appropriate,
suggest alternative interpretations of the results. This process will
allow you to apply the concepts learned throughout the course in the
interpretation of actual scientific research. Your critique must include
the following sections:
- Introduction: This section will include a
general introduction of the quantitative study from a peer-reviewed
source published within the last 10 years. The research questions
and/or hypothesis(es) as well as the purpose of the study should be
- Methods: Describe and evaluate the procedures
and methods of data collection, measures/instruments used, the
participants and how they were selected, and the statistical techniques
- Results: In this section describe and critique the results presented in the study.
- Discussion: Discuss and evaluate the efficacy
of the results presented in the study. Address, the strengths,
weaknesses, and limitations of the study, and suggest future research
directions. Include additional forms of statistical analyses as part of
the suggestions for future research.
The Research Study Critique:
- Must be three to four double-spaced pages in length (excluding
title and reference pages) and formatted according to APA style as
outlined in the Ashford Writing Center. Use 12-point font, with 1-inch
- Must use the sections and headings described above.
- Must address the article with critical thought by examining,
reflecting, and evaluating the article from an objective viewpoint and
by using facts to support your argument. Refer to the Critical Thinking
Community website for further assistance.
- Must end with a conclusion that summarizes your critical evaluation.
- Must use one quantitative research study from a peer-reviewed source that was published within the last 10 years.
- Must properly cite the source article in APA style