Elementary Statistics and Probability Unit 2: Data Collection and Sampling Techniques Introduction
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Questions and Answers

Why is it important to determine a sample size in a population?

  • To make the research study more appealing to the public
  • To ensure that the research study is cost-effective
  • To guarantee that the research study is accurate and representative (correct)
  • To showcase the researcher's mathematical skills

    • What is the main difference between probability and non-probability sampling techniques?

  • Probability sampling requires random selection while non-probability sampling does not (correct)
  • Non-probability sampling provides more accurate results compared to probability sampling
  • Probability sampling only selects individuals with similar characteristics while non-probability sampling does not have this limitation
  • Probability sampling is faster than non-probability sampling techniques

    • Which of the following is NOT a type of data collection method?

  • Survey
  • Observation
  • Interpolation (correct)
  • Experiment

    • In a research study, what does 'applying the appropriate sampling technique' refer to?

    <p>Using a method that matches the research objectives and population characteristics</p> Signup and view all the answers

    Why is it necessary to learn both probability and non-probability sampling techniques?

    <p>To ensure researchers understand different approaches based on their study needs</p> Signup and view all the answers

    What could happen if a small sample size is used in a research study?

    <p>The results may not be reflective of the entire population</p> Signup and view all the answers

    Which sampling technique lacks objectivity in the selection process?

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

    What is the defining feature of Quota Sampling?

    <p>Equal representation of subgroups in the population</p> Signup and view all the answers

    In which type of sampling are respondents chosen based on their knowledge of the desired information?

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

    What is a common reason for using Convenience Sampling?

    <p>Convenience for researchers</p> Signup and view all the answers

    If a study aims to determine the teenager’s most favorite brand of t-shirt without using randomization, which sampling technique is suitable?

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

    What kind of criteria are used in Purposive Sampling to select respondents?

    <p>Objective criteria chosen by researchers</p> Signup and view all the answers

    What is the main characteristic of Snowball Sampling as described in the text?

    <p>Research participants recruit other members for the study.</p> Signup and view all the answers

    In which situation would Snowball Sampling be most beneficial?

    <p>Investigating the social networks of homeless individuals.</p> Signup and view all the answers

    Which sampling technique involves selecting participants based on pre-defined characteristics?

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

    What makes Convenience Sampling different from Snowball Sampling?

    <p>Convenience Sampling involves selecting samples without any specific criteria.</p> Signup and view all the answers

    Which sampling technique involves dividing the population into smaller groups before sampling?

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

    Why might researchers choose Simple Random Sampling over Snowball Sampling for a study?

    <p>Simple Random Sampling guarantees representative samples.</p> Signup and view all the answers

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