Linear Regression Exercises 2025

Linear Regression Exercises Due 10/13/17 by 10 pm Simple Regression Research Question: Does the number of hours worked per week ( workweek ) predict family income ( income )? Using Polit2SetA data set, run a simple regression using Family Income ( income ) as the outcome variable (Y) and Number of Hours Worked per Week ( workweek ) as the independent variable (X). When conducting any regression analysis, the dependent (outcome) variables is always (Y) and is placed on the y-axis, and the independent (predictor) variable is always (X) and is placed on the x-axis. Follow these steps when using SPSS: 1. Open Polit2SetA data set. 2. Click on Analyze , then click on Regression , then Linear . 3. Move the dependent variable ( income ) in the box labeled “Dependent” by clicking the arrow button. The dependent variable is a continuous variable. 4. Move the independent variable ( workweek ) into the box labeled “Independent.” 5. Click on the Statistics button (right side of box) and click on Descriptives , Estimates , Confidence Interval (should be 95%), and Model Fit , then click on Continue . 6. Click on OK . Assignment: Through analysis of the SPSS output, answer the following questions. Answer questions 1 – 10 individually, not in paragraph form 1. What is the total sample size? 2. What is the mean income and mean number of hours worked? 3. What is the correlation coefficient between the outcome and predictor variables? Is it significant? How would you describe the strength and direction of the relationship? 4. What it the value of R squared (coefficient of determination)? Interpret the value. 5. Interpret the standard error of the estimate? What information does this value provide to the researcher? 6. The model fit is determined by the ANOVA table results ( F statistic = 37.226, 1,376 degrees of freedom, and the p value is .001). Based on these results, does the model fit the data? Briefly explain. (Hint: A significant finding indicates good model fit.) 7. Based on the coefficients, what is the value of the y-intercept (point at which the line of best fit crosses the y-axis)? 8. Based on the output, write out the regression equation for predicting family income. 9. Using the regression equation, what is the predicted monthly family income for women working 35 hours per week? 10. Using the regression equation, what is the predicted monthly family income for women working 20 hours per week? For this assignment, answer question 1 through 10 individually. DO NOT ANSWER IN PARAGRAPH FORM. Multiple Regression Assignment: In this assignment we are trying to predict CES-D score (depression) in women. The research question is: How well do age, educational attainment, employment, abuse, and poor health predict depression? Using Polit2SetC data set, run a multiple regression using CES-D Score ( cesd ) as the outcome variable (Y) and respondent’s age ( age ), educational attainment ( educatn ), currently employed ( worknow ), number, types of abuse ( nabuse ), and poor health ( poorhlth ) as the independent variables (X). When conducting any regression analysis, the dependent (outcome) variables is always (Y) and is placed on the y-axis, and the independent (predictor) variable is always (X) and is placed on the x-axis. Follow these steps when using SPSS: 1. Open Polit2SetC data set. 2. Click on Analyze, then click on Regression , then Linear . 3. Move the dependent variable, CES-D Score ( cesd ) into the box labeled “Dependent” by clicking on the arrow button. The dependent variable is a continuous variable. 4. Move the independent variables ( age , educatn , worknow , and poorhlth ) into the box labeled “Independent.” This is the first block of variables to be entered into the analysis (block 1 of 1). Click on the bottom (top right of independent box), marked “Next”; this will give you another box to enter the next block of indepdent variables (block 2 of 2). Here you are to enter ( nabuse ). Note: Be sure the Method box states “Enter”. 5. Click on the Statistics button (right side of box) and click on Descriptives , Estimates , Confidence Interval (should be 95%), R square change , and Model Fit , and then click on Continue . 6. Click on OK . Assignment: (When answering all questions, use the data on the coefficients panel from Model 2). Answer questions 1 – 5 individually, not in paragraph form 1. Analyze the data from the SPSS output and write a paragraph summarizing the findings. (Use the example in the SPSS output file as a guide for your write-up.) 2. Which of the predictors were significant predictors in the model? 3. Which of the predictors was the most relevant predictor in the model? 4. Interpret the unstandardized coefficents for educational attainment and poor health. 5. If you wanted to predict a woman’s current CES-D score based on the analysis, what would the unstandardized regression equation be? Include unstandardized coefficients in the equation. For this assignment, answer question 1 through 5 individually. DO NOT ANSWER IN PARAGRAPH FORM. Required Readings Gray, J.R., Grove, S.K., & Sutherland, S. (2017) . Burns and Grove’s the practice of nursing research: Appraisal, synthesis, and generation of evidence (8th ed.). St. Louis, MO: Saunders Elsevier . Chapter 24, “Using Statistics to Predict” This chapter asserts that predictive analyses are based on probability theory instead of decision theory. It also analyzes how variation plays a critical role in simple linear regression and multiple regression. Statistics and Data Analysis for Nursing Research Chapter 9, “Correlation and Simple Regression” (pp. 208–222) This section of Chapter 9 discusses the simple regression equation and outlines major components of regression, including errors of prediction, residuals, OLS regression, and ordinary least-square regression. Chapter 10, “Multiple Regression” Chapter 10 focuses on multiple regression as a statistical procedure and explains multivariate statistics and their relationship to multiple regression concepts, equations, and tests. Chapter 12, “Logistic Regression” This chapter provides an overview of logistic regression, which is a form of statistical analysis frequently used in nursing research. Optional Resources Walden University. (n.d.). Linear regression. Retrieved August 1, 2011, from http://streaming.waldenu.edu/hdp/researchtutorials/educ8106_player/educ8106_linear_regression.html

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Week 6 Benchmark – Drafting a Literature Review 2025

Week 6 Assignment Instructions Tutor MUST have a good command of the English language Tutor MUST have a good command of the English language Sources need to be less than five years old and journal/scholarly articles. Use only articles that are published between 2014-2018 (except for your theory articles which will be older as you must cite primary sources). No textbook or direct quotes Rubric Requirements must be met This is a continuation of the literature review that is attached. The new assignment needs to be added to the attached document. In this assignment, you will draft the body of a literature review. You will continue to add and revise this draft literature review (Chapter 2 of your DPI Project) as you progress through the program. You may be able to use the feedback and suggestions from your instructor (on the Introduction to the Literature Review assignment in Topic 4) to expand the literature review for this assignment. General Requirements: Use the following information to ensure successful completion of the assignment: Use the “Empirical Research Checklist” worksheet to ensure that each article you select meets all of the established criteria. Use the “Research Article Chart” to provide a summary review of each component of your assignment. Submit the completed Research Article Chart to your instructor. Refer to the most recent prospectus template found in the DC Network (dc.gcu.edu) for details and criteria for the Literature Review (Chapter 2). Doctoral learners are required to use APA style for their writing assignments. The APA Style Guide is located in the Student Success Center. An abstract is not required. This assignment uses a rubric. Please Review the rubric prior to the beginning to become familiar with the expectations for successful completion. You are required to submit this assignment to Turnitin. Please refer to the directions in the Student Success Center. Directions: Part 1: Selection of 15 Articles Select 15 empirical articles related to your PICOT question. Use the “Empirical Research Checklist” worksheet to ensure that each article you select meets all of the established criteria. At least one article must demonstrate a quantitative methodology. Part 2: Research Article Chart Using the articles acquired in Part 1, provide a summary review of each component using the “Research Article Chart” template. Part 3: Literature Review Prepare a Literature Review (Chapter 2) of 2,000-3,000 words for your scholarly project. Utilizing the major concepts identified in the Topic 4 assignment, further develop each major concept and subtheme by locating 15 more empirical articles related to your project topic (30 articles total: 15 from Topic 4 assignment and 15 from Topic 6 assignment). Use the “Research Article Chart” as a guide to analyze and synthesize (summarize) the literature into the paper you began in the Topic 4 assignment. Based upon your review of the 15 additional research articles, expand on your summary of each major concept and your synthesis of the three identified subthemes that support each concept. At the end of each major concept, include a summary statement.

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