Identifying Variables in a Research Study
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Questions and Answers

What is a variable in a study?

  • The sample size chosen for the study
  • A certain attribute of the population (correct)
  • The research problem being investigated
  • The timeframe in which the study is conducted

    • How can you identify the variables of a study?

  • By understanding the research problem
  • By questioning what information is needed from each subject (correct)
  • By determining the sample size needed
  • By analyzing the study's objectives

    • What could happen if variables are not identified early in a study?

  • Missing important information in the instrument formulation (correct)
  • Improved clarity in defining the population
  • Increased focus on the research problem
  • Enhanced accuracy in data collection

    • In the example provided, what was the population of the study?

    <p>All USLS BStat students for a specific semester</p> Signup and view all the answers

    If 'BStat' was omitted from the study description, how would it affect the population's scope?

    <p>It would narrow the scope to a different course</p> Signup and view all the answers

    Why is it important to identify variables for each stated specific objective?

    <p>To ensure no crucial information is overlooked</p> Signup and view all the answers

    What is a key characteristic of the nominal scale of measurement?

    <p>Categories are mutually exclusive</p> Signup and view all the answers

    Which operation cannot be applied to numbers in the nominal scale?

    <p>Comparison</p> Signup and view all the answers

    Why can't you find the 'average sex' using numbers in the nominal scale?

    <p>Numbers do not have numeric properties</p> Signup and view all the answers

    In the nominal scale, what does assigning the number 2 to Female imply?

    <p>'Female' is better than 'Male'</p> Signup and view all the answers

    What does it mean for categories to be exhaustive in the nominal scale?

    <p>There must be enough categories for all observations</p> Signup and view all the answers

    Why is it important that numbers in the nominal scale do not duplicate?

    <p>Duplicates violate the mutually exclusive property of categories</p> Signup and view all the answers

    What is the main difference between categories and levels?

    <p>Levels have an intrinsic order, while categories do not.</p> Signup and view all the answers

    Which characteristic ensures that respondents provide only one answer?

    <p>Mutually exclusive</p> Signup and view all the answers

    What is the purpose of using 'Others, please specify' in the categories?

    <p>To include all possibilities, especially those with low frequencies</p> Signup and view all the answers

    Which variable type has values that can be measured and manipulated?

    <p>Continuous</p> Signup and view all the answers

    In terms of quantitative variables, what forms attributes?

    <p>Counts or measurements</p> Signup and view all the answers

    Why is it important for categories to be exhaustive in a survey?

    <p>To cover all possible answers, especially those with low frequencies</p> Signup and view all the answers

    What does a score of 0 on a test imply?

    <p>Complete absence of knowledge gained by a student</p> Signup and view all the answers

    Which scale possesses all the characteristics of the interval scale and has a true or absolute zero point?

    <p>Ratio Scale</p> Signup and view all the answers

    Why is Ratio Scale considered the most informative scale?

    <p>It provides information about the order and number of objects between values</p> Signup and view all the answers

    Which example best represents ratio data according to the text?

    <p>Height and weight</p> Signup and view all the answers

    Why is it relevant to say 'one object has twice the length of the other' in ratio scale data?

    <p>Because ratio data has a true zero point</p> Signup and view all the answers

    What type of variables generate either interval or ratio scale data?

    <p><strong>Quantitative</strong> variables</p> Signup and view all the answers

    Which scale of measurement indicates the direction of difference?

    <p>Ordinal</p> Signup and view all the answers

    In the context of scales of measurement, which one meets all four properties?

    <p>Ratio</p> Signup and view all the answers

    Which variable is qualitative?

    <p>Ratio of current assets to current liabilities</p> Signup and view all the answers

    What type of variable is 'Brand of jeans you prefer'?

    <p>Qualitative</p> Signup and view all the answers

    Which example represents a sample rather than a population?

    <p>A group of 25 customers selected to taste a new soft drink</p> Signup and view all the answers

    What type of variable is 'Number of text messages received per day'?

    <p>Quantitative discrete</p> Signup and view all the answers

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