18 Questions
How can you select a sample using stratified sampling?
Divide the population into strata and select members from each stratum randomly
What is the purpose of using stratified sampling?
To ensure every member of the population has an equal chance of being selected
How is the sample size determined in stratified sampling?
By dividing the total population by the total sample size
Why is it important to use stratified sampling instead of simple random sampling?
Stratified sampling guarantees representation from all subgroups
What should be done if the computed sample size for a stratum results in a decimal value?
Round up to the nearest whole number
Which method is used to select members within each stratum in stratified sampling?
Simple random sampling
What is the main characteristic of multi-stage cluster sampling?
The entire population is divided into clusters
How does cluster sampling differ from stratified sampling?
In cluster sampling, the sample consists of elements from selected clusters only.
What is the purpose of dividing the population into clusters in cluster sampling?
To ensure each element has an equal chance of being selected
In cluster sampling, how are the clusters selected for analysis?
By randomly selecting clusters from the entire population
What is the key difference between simple random sampling and systematic random sampling in cluster sampling?
Simple random sampling involves every element having an equal chance of selection, while systematic random sampling selects elements at regular intervals.
How does multi-stage cluster sampling ensure a representative sample?
By randomly selecting clusters and elements from within them
In systematic sampling, if you have a group of 100 individuals, and you want to select a sample of 20 individuals, what would be the interval to select every 5th individual?
5
What is the first step in performing systematic sampling?
Randomly arranging the individuals in the sampling frame
In stratified sampling, why is the population divided into subgroups or strata?
To achieve more precise estimates by considering different groups within the population
What is a key characteristic of stratified sampling compared to simple random sampling?
It allows for targeted sampling within specific groups of interest
If you want to ensure representation from different age groups in a survey, which sampling method would be most appropriate?
Stratified sampling
How does systematic sampling differ from stratified sampling?
Systematic sampling involves random selection, while stratified sampling uses pre-determined criteria to form subgroups.
Test your understanding of systematic sampling, where every kth element from a list is selected. Learn how to apply this technique to select a sample from a population. Practice selecting samples based on a given interval and population size.
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