Sampling Methods in Research
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Questions and Answers

What are inclusion criteria in a study population?

  • Attributes or characteristics of participants that allow their participation in the study
  • Attributes or characteristics of eligible participants that disallow their participation
  • Attributes or characteristics of participants that are essential for them to be eligible to participate in the study (correct)
  • Attributes or characteristics of eligible participants that disqualify them from the study

    • What is the purpose of estimating sample size in a study?

  • To ensure that the entire study population is enumerated in a reasonable period of time
  • To select a subset of the population without estimating the sample size
  • To select a subset of the population or a sample, and estimate the sample size (correct)
  • To identify the complexities of sample size calculation

    • What does power refer to in the context of estimating sample size?

  • The probability that your test will find a statistically significant difference when such a difference actually exists (correct)
  • The probability of finding a statistically significant difference when such a difference does not actually exist
  • The likelihood of changes observed in the study population
  • The probability of making a Type II error

    • What are exclusion criteria in a study population?

    <p>Attributes or characteristics of eligible participants that disqualify them from the study</p> Signup and view all the answers

    What do statistical tests look for when determining power?

    <p>Evidence that you can reject the null hypothesis and conclude that your program had an effect</p> Signup and view all the answers

    What is the theoretical population in a research study?

    <p>The group of people or objects to which findings are generalized</p> Signup and view all the answers

    What is the process of selecting a number of study units from a defined population called?

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

    What is the main consideration when determining sample size for a study?

    <p>The statistical power of the study</p> Signup and view all the answers

    Why is it necessary to clearly define the study population for sampling?

    <p>To generalize findings effectively</p> Signup and view all the answers

    Which factor determines whether a sample can include all members of the population in an investigation?

    <p>Practical reasons</p> Signup and view all the answers

    What is the main purpose of sampling in a research study?

    <p>To select a number of study units from a defined population</p> Signup and view all the answers

    What does the term 'theoretical population' refer to?

    <p>The group to which the study findings are generalized</p> Signup and view all the answers

    Why is it necessary to define the study population according to age, sex, and residence?

    <p>To avoid any bias in the selection of the study sample</p> Signup and view all the answers

    What influences the determination of sample size in a research study?

    <p>The objectives and method of the research study</p> Signup and view all the answers

    When might it be practical to include all members of the population in a research study?

    <p>When the study focuses on a small population</p> Signup and view all the answers

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