ANSWER
Part 1: Logistic Regression Analysis
Research Question: To determine the impact of two independent variables on a binary dependent variable.
Variables:
- Dependent Variable: Binary outcome (e.g., Yes/No, 1/0)
- Independent Variable 1: Variable used in the previous week’s analysis
- Independent Variable 2: New independent variable introduced this week
Analysis Steps:
- Import your data into SPSS.
- Perform a multiple logistic regression analysis with the two independent variables and the binary dependent variable.
- Examine the output for the statistical significance of the coefficients and odds ratios of both independent variables.
- Interpret the odds ratios to understand how the odds of the dependent variable change with changes in the independent variables.
Analysis Interpretation (APA format): In your analysis, you would present the results of the logistic regression analysis. Discuss whether the predictive relationship is statistically significant. If the p-values associated with the coefficients of the independent variables are below a certain significance level (e.g., 0.05), you can state that the relationship is statistically significant. Interpret the odds ratios to explain the practical implications of the results. For instance, an odds ratio of 1.5 would indicate that for a one-unit increase in the independent variable, the odds of the dependent variable increase by 50%.
Part 2: Article Critique
In your critique of the research article you found:
- Reasons for Binary Logistic Regression: Discuss why the authors chose binary logistic regression for their research. Binary logistic regression is commonly used when the dependent variable is binary (dichotomous). This method is appropriate when investigating relationships between one or more independent variables and a binary outcome.
- Appropriateness of the Test: Provide your opinion on whether binary logistic regression was the most appropriate choice for this research. Consider factors like the nature of the dependent variable, research objectives, and available data. Justify your response.
- Display of Results: Evaluate whether the authors displayed the results in a figure or table. If they did, discuss how effective it was in conveying the information. If not, consider how a visual representation could have enhanced the presentation of results.
- Stand-Alone Results Table: Assess whether the results table is comprehensive enough to be understood on its own. Can readers interpret the study solely based on the information presented in the table? Discuss the clarity and completeness of the information provided.
Remember to support your responses with reasoning and examples. Additionally, consider the research methodology, sample size, and any potential limitations of the study when forming your critique.
Keep in mind that the specifics of the analysis and critique will depend on the data and article you’re working with. Always refer to your course materials and guidelines for any specific requirements or formatting instructions.
QUESTION
Description
This week you will build on the simple logistic regression analysis did last week. You will use the same two variables (one independent variable and one dependent variable) you used in your SPSS analysis last week and add a second independent variable to the analysis. How has your statistical significance and odds ratio changed by the introduction of the second independent variable?
To prepare
- Use the one independent variable and one dependent variable you used to conduct your simple logistic regression analysis in Week 4.
- Add a second independent variable to your analysis (multiple logistic regression).
- Remember that your dependent variable must be dichotomous/binary.
- Think about how you might use the odds ratio in your analysis to simplify the interpretation of your results.
- How has your statistical significance and odds ratio changed by the introduction of the second independent variable?
The Assignment
Use SPSS to answer the research question you constructed. Then, compose a 1- to 2-paragraph analysis in APA format including discussion of if the predictive relationship is statistically significant and the odds ratio and what it means.
Be sure to include your data output with your analysis. See page 1032 in your Warner textbook for an excellent APA-compliant write-up of a binary logistic regression analysis.
PART 2
Article Critique
The Assignment
Write a 2- to 3-page critique of the research you found in the Walden Library that includes responses to the following prompts:
- Why did the authors select binary logistic regression in the research?
- Do you think this test was the most appropriate choice? Why or why not?
- Did the authors display the results in a figure or table?
- Does the results table stand alone? In other words, are you able to interpret the study from it? Why or why not?
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