1 Lec Q - Sampling Methods and Objectives Quiz
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Questions and Answers

Which type of error arises from inaccuracies in the collection, recording, and processing of data?

  • Sampling error
  • Systematic error (correct)
  • Non-probability error
  • Random error

    • Which type of sampling method involves selecting participants based on ease of access?

  • Simple random sampling
  • Stratified sampling
  • Cluster sampling
  • Convenience sampling (correct)

    • Which type of sampling method allows for the generalization of results to the population?

  • Probability sampling (correct)
  • Stratified sampling
  • Purposive sampling
  • Snowball sampling

    • What is the difference between precision and accuracy?

    <p>Precision is a measure of the variability of the sample estimate, while accuracy is a measure of how close the sample estimate is to the true value.</p> Signup and view all the answers

    What type of error is the difference between the result of a sample and the true value of the population?

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

    What type of sampling method involves selecting participants based on referrals from existing participants?

    <p>Snowball sampling</p> Signup and view all the answers

    Which type of sampling method involves selecting participants based on judgment or expertise?

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

    What type of samples are cheaper but unable to generalize the results to the population?

    <p>Non-probability samples</p> Signup and view all the answers

    What type of sampling method involves dividing the population into subgroups and selecting participants from each subgroup?

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

    What type of sampling method involves selecting participants at regular intervals from an ordered list of the population?

    <p>Systematic sampling</p> Signup and view all the answers

    Which of the following is the definition of sampling unit?

    <p>The unit from which the sample will be selected</p> Signup and view all the answers

    What is the purpose of using sampling?

    <p>B &amp; C</p> Signup and view all the answers

    What is the target population?

    <p>The population to which the investigator wishes to generalize</p> Signup and view all the answers

    What is the definition of response rate?

    <p>The percentage of people in the sample who actually participate in the study</p> Signup and view all the answers

    What is the definition of sampling frame?

    <p>The list of all sampling units in the target population</p> Signup and view all the answers

    What is the definition of inquiry unit?

    <p>The unit from which or about which data will be collected</p> Signup and view all the answers

    What is the main objective of sampling?

    <p>To select representatives of the entire population</p> Signup and view all the answers

    What is the definition of sample?

    <p>A subset of the population selected in such a way that it is representative of the target population</p> Signup and view all the answers

    What is the definition of sampling?

    <p>Procedure by which some members of a given population are selected as representatives of the entire population.</p> Signup and view all the answers

    Which sampling method is considered the most reliable of all sampling methods?

    <p>Simple Random Sample</p> Signup and view all the answers

    What is the disadvantage of using a Simple Random Sample in populations with a high degree of heterogeneity?

    <p>The sample results will have a low degree of precision</p> Signup and view all the answers

    Which sampling method involves selecting every nth element after randomly selecting the first element?

    <p>Systematic Random Sample</p> Signup and view all the answers

    What is the advantage of using a Systematic Random Sample over a Simple Random Sample?

    <p>A &amp; C</p> Signup and view all the answers

    Which sampling method involves Sample that has members from each segment of the population?

    <p>Stratified Random Sample</p> Signup and view all the answers

    What is the disadvantage of using a Stratified Random Sample?

    <p>Difficulty in constructing the frame when stratum sizes are large</p> Signup and view all the answers

    Which sampling method involves selecting participants at regular intervals from an ordered list of the population?

    <p>Systematic Random Sample</p> Signup and view all the answers

    What is the disadvantage of using a Systematic Random Sample if there is periodicity in the sampled population?

    <p>The sample results will be biased</p> Signup and view all the answers

    What is the disadvantage of using Judgmental Sampling?

    <p>Selection bias may occur</p> Signup and view all the answers

    Which method of simple random selection involves preparing a frame, securing an ideal bowl, and selecting cards from the bowl without replacement?

    <p>Ideal Bowl Method</p> Signup and view all the answers

    What is the purpose of assigning a number to each member of the population in simple random sampling?

    <p>To create a sampling frame</p> Signup and view all the answers

    Which method of simple random selection involves using a list of numbers where the digits 0-9 are arranged in a random order to select the sample?

    <p>Tables of random numbers</p> Signup and view all the answers

    What is the difference between sampling with replacement and sampling without replacement?

    <p>Sampling with replacement allows selected units to be chosen again, while sampling without replacement does not</p> Signup and view all the answers

    Which of the following methods of simple random selection involves using a computer to generate random numbers for sample selection?

    <p>Computer generated random selection</p> Signup and view all the answers

    Which method of simple random selection involves selecting the sample by progressing along one or more adjacent rows of digits in a table of random numbers?

    <p>Tables of random numbers</p> Signup and view all the answers

    What is the purpose of thoroughly mixing the cards in the ideal bowl in the Ideal Bowl Method of simple random selection?

    <p>To ensure random selection of cards</p> Signup and view all the answers

    Which method of simple random selection involves selecting the sample by using a random number table?

    <p>A &amp; D</p> Signup and view all the answers

    What is the purpose of using simple random sampling?

    <p>To ensure equal opportunity of selection</p> Signup and view all the answers

    What is the Advantage of the simple random sampling?

    <p>Selection procedures are simple</p> Signup and view all the answers

    What is the disadvantage of using a Simple Random Sample?

    <p>Difficulty in construction of frame particularly for large population</p> Signup and view all the answers

    Which method of simple random selection involves using an ideal bowl with a smooth inner surface and folded cards with serial numbers?

    <p>Ideal Bowl Method</p> Signup and view all the answers

    What is the Advantages of using Stratified Random sampling?

    <p>A &amp; B</p> Signup and view all the answers

    What is the Methods of allocation of sample size?

    <p>All of the above</p> Signup and view all the answers

    Which type of sampling method involves dividing the population into groups and selecting a random sample from each group?

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

    Which type of sampling method involves dividing the population into subgroups and selecting participants from each subgroup?

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

    What is the purpose of using Cluster sampling?

    <p>To reduce travel by interviewing many respondents within the same geographic area</p> Signup and view all the answers

    What is the main objective of sampling?

    <p>To make inferences about a population based on a subset of the population</p> Signup and view all the answers

    Which type of error arises from inaccuracies in the collection, recording, and processing of data?

    <p>Non-sampling error</p> Signup and view all the answers

    Selecting a sampling method:

    <p>Resources available + All of the above</p> Signup and view all the answers

    Which type of sampling method allows for the generalization of results to the population?

    <p>Probability Samples</p> Signup and view all the answers

    What is the disadvantage of using Stratified Random Sampling?

    <p>Difficulty in constructing the frame when stratum sizes are large</p> Signup and view all the answers

    Which sampling method is used when no sampling frame is available?

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

    What is a cluster in the context of Cluster Sampling?

    <p>A group of sampling units close to each other</p> Signup and view all the answers

    In Cluster Sampling, what is done if clusters are big and of equal size?

    <p>The sample is divided equally over selected clusters</p> Signup and view all the answers

    What is the main advantage of using Stratified Random Sampling?

    <p>A &amp; B</p> Signup and view all the answers

    Which one of the following is under the Multi-stage Random Sample?

    <p>the selection of sample in stages and for each stage the construction of the frame for that particular stage is always an easy task</p> Signup and view all the answers

    What is the main disadvantage of using Cluster Sampling?

    <p>Lower precision compared to other probability samples</p> Signup and view all the answers

    What is the main advantage of using Proportional Allocation?

    <p>Allocation over strata proportional to stratum size</p> Signup and view all the answers

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