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[SOLVED] TESTING TO FIND RELATIONSHIPS BETWEEN TWO VARIABLES: There are three main statistical families of techniques that are commonly used to examine the relationship or association between variables.

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Testing to Find Relationships Between Two Variables:

 

Overview

There are three main statistical families of techniques that are commonly used to examine the relationship or association between variables. The chi-square family looks at the relationship strength of categorical variables, whereas the correlation family looks at the strength of linear relationship of interval/ratio variables—but some tests in this family can also examine other measurement-level combinations. The regression family goes one step further than the previous tests by assessing the relative strength of one or more variables in predicting the change in another variable.

Before committing to any particular test, you must clarify the nature of the relationship you are interested in, determine how many variables are involved, and determine the measurement levels of each variable.

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TESTING TO FIND RELATIONSHIPS BETWEEN TWO VARIABLES

 

Overview

There are three main statistical families of techniques that are commonly used to examine the relationship or association between variables. The chi-square family looks at the relationship strength of categorical variables, whereas the correlation family looks at the strength of linear relationship of interval/ratio variables—but some tests in this family can also examine other measurement-level combinations. The regression family goes one step further than the previous tests by assessing the relative strength of one or more variables in predicting the change in another variable.

Before committing to any particular test, you must clarify the nature of the relationship you are interested in, determine how many variables are involved, and determine the measurement levels of each variable.

Preparation

You are encouraged to review the chi-square, correlation, and regression materials from previous weeks. Then, review How to Choose a Statistical Test and the test-selection tutorials linked in the Resources to determine which test is most likely to be appropriate for your data type.

Instructions

Using the Framingham study data set, perform and interpret statistical tests that answer the following research questions. Then, provide a written analysis of your results.

  • At baseline, was there a significant association between diabetes (variable: diabetes1) and smoking status (variable: cursmoke1)?
  • At baseline, how much variation in participant cholesterol levels (variable: totchol1) could be explained by the variation in an individual’s BMI (variable: bmi1)?

Written Analysis Format and Length

Format your analysis using APA style.

  • An APA Style Paper Tutorial is provided to help you in writing and formatting your analysis.
  • Your analysis should be 2–3 pages in length, not including the title page and references page.

Note: The requirements outlined below correspond to the grading criteria in

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the rubric. Be sure that your statistical analysis addresses each point, at a minimum. You may also want to read the rubric to better understand how each criterion will be assessed.

  • Perform the appropriate statistical tests (based on the assumption test).
    • Provide your rationale for test selection.
  • Interpret the results of your statistical tests (chi-square, correlation, and regression) for each research question.
    • Consider associated caveats and limitations.
  • Determine the practical, public health-related implications of your statistical tests (chi-square, correlation, and regression).
    • What evidence do you have that validates your conclusions?
  • Write clearly and concisely, using correct grammar, mechanics, and APA formatting.
    • Write for an academic audience, using appropriate statistical terminology, style, and form.
    • Express your main points and conclusions coherently.
    • Proofread your writing to minimize errors that could distract readers and make it more difficult for them to focus on the substance of your statistical analysis.

Submission Instructions

  • Include the test results and associated graphic in your written analysis (copied from the output and pasted into a Word document).
  • Submit both the Word document and the .jasp file that shows your analyses and output for this assignment. Make sure you save your .jasp file after running your analyses to ensure you are uploading your output.
Resources

Use this file for this week’s assignment. Framingham Week 7 [XLSX]

Related: You are an experienced ethics officer who has recently been hired by an established company.

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