Sampling Techniques: Random Sampling
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Sampling Techniques: Random Sampling

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Questions and Answers

What is the main difference between systematic random sampling and stratified random sampling?

  • Systematic random sampling involves choosing a random starting point, while stratified random sampling groups the population based on categories. (correct)
  • Systematic random sampling eliminates bias, while stratified random sampling increases the likelihood of bias.
  • Systematic random sampling focuses on selecting elements from each stratum, while stratified random sampling involves lottery selection.
  • Systematic random sampling involves dividing the population into groups, while stratified random sampling considers every kth element.

    • If a population of 100 students is to be sampled using systematic random sampling with a sample size of 20, what would be the value of q in this scenario?

  • 20
  • 4
  • 5 (correct)
  • 10

    • In systematic random sampling, how can the starting point be determined?

  • By choosing any arbitrary number as the starting point
  • By selecting the smallest number in the population
  • Using a lottery method on all population numbers
  • By dividing the total number of population members by the desired sample size (correct)

    • What is a key advantage of stratified random sampling over systematic random sampling?

    <p>Stratified random sampling ensures each stratum is represented in the sample</p> Signup and view all the answers

    If a population of 80 individuals is divided into 4 strata for stratified random sampling, how many individuals would be in each stratum if all strata are required to be equally represented in the sample?

    <p>24</p> Signup and view all the answers

    Why might stratified random sampling be preferred over systematic random sampling?

    <p>It ensures equal representation of all population groups</p> Signup and view all the answers

    What is random sampling?

    <p>A technique used to choose sample members where everyone in the population has equal chances of being included</p> Signup and view all the answers

    What is the lottery method in random sampling?

    <p>A technique where researchers randomly select sample members using a draw</p> Signup and view all the answers

    Why might systematic random sampling be preferred over simple random sampling?

    <p>It requires less effort and time</p> Signup and view all the answers

    How does systematic random sampling work?

    <p>Selecting every 5th individual from the population list</p> Signup and view all the answers

    What is stratified random sampling?

    <p>A technique used to divide the population into subgroups before sampling from each subgroup</p> Signup and view all the answers

    What is a key advantage of using stratified random sampling over simple random sampling?

    <p>It allows for representation from different subgroups in the population</p> Signup and view all the answers

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