NATS 1500 2017W/Individual Assignment 5

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Deadline: Monday, February 13
Weight: 3 regular individual assignments
Hand in through Moodle as one PDF file. If you can't submit a PDF file, submit a Word file.
Questions are referred to by chapter and question number, e.g. 7.32 is question 32 in chapter 7. No page numbers are given because the questions appear on different pages in different printings of the textbook. The questions are collected together at the end of each chapter.

  • Chapter 1:
    • 1.20
    • 1.23
  • Chapter 2:
    • 2.30 (modified as follows) [worth 4 ordinary questions]
      Find an example of a study about which something has been published online that involves data about the relationship between at least two variables .
      • Provide a URL for the online content.
      • Determine what variables were measured and for each variable, determine its type: quantitative or categorical? Is it ordinal?
      • Is the data in study observational or experimental?
      • Are there claims about the relationships between the variables? Are the claims causal or predictive?
      • How strongly do you think the claims are supported? Are there flaws in statistical reasoning?
    • 2.35
    • 2.63
    • 2.64
    • 2.68
    • 2.71
    • 2.76
    • 2.77
    • 2.85
  • Chapter 3:
    • 3.32
    • 3.37
    • 3.46
    • 3.51 (Note: 'interacting variable', 'effect modifier' and 'moderator variable' are closely related concepts.)