Questions and Answers
What margin of error was used to determine the sample size for the small town of 750 residents?
How many students were in the population for the survey conducted by the researchers?
What was the sample size calculated using Slovin's formula for a population of 2,500 people with a margin of error of 5%?
How many residents did the researchers find in Sitio Dalawang Kawayan?
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What method did the researchers use to select participants from the residents in their study?
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In the study on the acceptance of the innovated pandesal, what aspects were evaluated among the residents?
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Which assessment was mentioned in the study conducted by the researchers from the TVL- BPP?
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Who facilitated the introduction of the researchers to the passers of the TESDA NCII Assessment?
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What is the purpose of using stratified random sampling?
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In the scenario presented, what was the total number of participants in the study after adding the additional participants?
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Which of the following describes a simple random sample?
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What is the result of the sample size calculation for Group 1 using the previous data?
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How does stratified random sampling differ from simple random sampling?
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What method was used to determine the sample size and margin of error in the study?
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In the example given, how many total participants were sampled from Group 2?
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Which of the following is NOT a characteristic of stratified random sampling?
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Study Notes
Overview of Research Participation Gathering
- Initial participants were gathered through recommendations, leading to further involvement of additional individuals.
- Total of 23 participants were added through word-of-mouth from existing participants who passed the NCII assessment.
Probability Sampling
- Every member of the population has a chance of being selected for the study.
Stratified Random Sampling
- This method divides the population into smaller subgroups known as strata.
- Also referred to as proportional or quota random sampling, ensuring representation from various sections of the population.
Sample Calculation
- Total population = 450; determined sample size = 212 using Slovin’s formula.
- Group distribution:
- Group 1: 280 participants, selected sample size = 132.
- Group 2: 100 participants, selected sample size = 47.
- Group 3: 70 participants, selected sample size = 33.
Proportional Representation
- Group population percentages calculated:
- Group 1: 280 x 62%
- Group 2: 100 x 22%
- Group 3: 70 x 16%
Simple vs. Stratified Random Sampling
- Simple random sample represents the entire population without subgroups.
- Stratified random sample segments the population into groups based on shared characteristics for improved representativeness.
Application of Slovin's Formula
- Example of a study with a town population of 750 residents indicates the usage of Slovin's formula to determine sample size with a margin of error of 0.01.
- In a population of 8,000 students, a margin of error of 10% also allows for sample size determination through Slovin's formula.
- For a population of 2,500 individuals with a 5% margin of error, sample size can again be determined using the same formula.
Case Study: Residents of Sitio Dalawang Kawayan
- Researchers conducted a survey on the acceptance of an innovated pandesal among local residents.
- Secured permission and information from the barangay captain about residents aged 18 and above, totaling 450 residents.
- Sample size of 212 was calculated and participants were selected randomly using a fishbowl method.
Case Study: SHS Graduates in Tanay
- Researchers targeted TESDA NCII assessors and passers to establish connections with more candidates, highlighting the role of networking and recommendations in participant selection.
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Description
This quiz explores the methods used by researchers to gather participants for their study, focusing on the concept of probability sampling. Understand how initial participants can influence additional recruitment through word-of-mouth in a statistical context. Test your knowledge on these statistical techniques and their applications.
