Reliability and Types of Variables in Statistics
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Questions and Answers

What is the primary purpose of a nominal variable?

  • To determine the reliability of a measurement instrument
  • To name, label or categorize particular attributes (correct)
  • To measure the quantity of an attribute
  • To determine the order or rank of an attribute

    • Which of the following is an example of an ordinal variable?

  • Rating of a product on a scale of 1 to 5 (correct)
  • Email address
  • Age in years
  • Gender

    • What is the minimum value of reliability considered as 'excellent' according to Hinton et al. (2004)?

  • 0.80
  • 0.90 (correct)
  • 0.70
  • 0.95

    • What is the relationship between reliability and validity?

    <p>A test must be reliable and valid</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a nominal variable?

    <p>It has an intrinsic ordering of categories</p> Signup and view all the answers

    What is the second level of measurement?

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

    What is the primary characteristic of nominal variables?

    <p>They take qualitative values representing different categories.</p> Signup and view all the answers

    Which type of variable is an extension of nominal variables and takes values with an order or rank?

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

    What is the key feature of interval variables?

    <p>Every point in the scale is equidistant.</p> Signup and view all the answers

    Which type of variable is used to measure values with a true zero value?

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

    What is the primary purpose of measurement strategies in research?

    <p>To collect data through various methods</p> Signup and view all the answers

    What is the main characteristic of an interval variable?

    <p>Each point is placed at an equal distance from one another.</p> Signup and view all the answers

    What is the term for the tools or methods used to collect data in research?

    <p>Information collection methods</p> Signup and view all the answers

    What type of variable is height an example of?

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

    What is the difference between an interval variable and a ratio variable?

    <p>Ratio variables have a zero value, while interval variables do not.</p> Signup and view all the answers

    What is an example of an interval variable?

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

    What is the purpose of pre-testing in research?

    <p>To check the clarity and context of the research instructions and questions</p> Signup and view all the answers

    What is the minimum reliability suggested for an exploratory or pilot study?

    <p>0.60</p> Signup and view all the answers

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