22 Questions
What is the main reason for using sampling methods instead of a complete census?
Lack of resources and time constraints
What type of sampling involves selecting every nth individual from a list?
Systematic sampling
What is the basic principle of simple random sampling?
Each member of the population has an equal and known chance of being selected
What is the advantage of using probability sampling methods?
They provide accurate estimates of the population's characteristics
What is a sampling unit?
A basic unit around which a sampling procedure is planned
What is a sampling frame?
A list of all members of the population
What is the main difference between simple random sampling and systematic sampling?
Systematic sampling involves a gap between each selected unit, while simple random sampling does not
What is required in advance for simple random sampling to be appropriate?
Knowledge of the complete sampling frame
What is the main advantage of simple random sampling?
It is simple to carry out and easy to understand
When is simple random sampling appropriate?
When a good sampling frame exists and the population is geographically concentrated
What is another name for systematic sampling?
Interval sampling
What type of sampling is simple random sampling an example of?
Probability sampling
What is the purpose of determining the sampling interval (k) in interval sampling?
To determine the number of units to be sampled from the population
What is the main advantage of systematic sampling over simple random sampling?
It ensures coverage of the whole spectrum of units
What is the main disadvantage of interval sampling?
It may arise as a sampling problem to meet adequate sample size
What is the purpose of stratified sampling?
To produce a more representative and accurate sample
What is the difference between proportionate and disproportionate stratified random sampling?
Proportionate sampling ensures that the sample size of each stratum is proportionate to the population size, while disproportionate sampling does not
What is the main advantage of cluster sampling?
It is cost-effective and time-efficient
What is the purpose of a sampling frame in probability sampling?
To provide a complete list of all units in the population
What is the difference between probability and non-probability sampling?
Probability sampling ensures that every unit in the population has an equal chance of being selected, while non-probability sampling does not
What is the purpose of randomization in probability sampling?
To reduce bias in the sampling process
What is the main advantage of stratified sampling over simple random sampling?
It produces more precise estimates of population parameters
Learn how to determine the sampling interval by dividing the population size by the desired sample size and selecting units at random. Practice selecting every kth unit to obtain a representative sample.
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