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There are a number of benefits and drawbacks to stratified sampling. Two benefits are:
- You have a cross-section of the population, so this is more likely to be representative and thus easier to generalise.
- You are less likely to get a "freak" sample.
Two drawbacks are:
- This is a very long and difficult form of sampling. It could be inconvenient or costly.
- You may not stratify the population by the relevant factors - what if their gender isn't important, but their economic bracket is?
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What is occurs when some population units are excluded from the process of selecting the sample?
sampling errorS OCCURES WHEN SOME POPULATION UNITS ARE EXCLUDED FOR SAMPLING
How is data collected in statistics?
data can be collected many different ways, but a survey can be cunducted in a few different ways some of them are: simple random, stratified, block samples stratified simple random
What is systematic sampling?
In systemic sampling, we select some starting point and then select every kth (such as the 50th) element in the population. Per Elementary Statistics by Triola, page 24
What are the Advantage and disadvantage of purposive sampling?
Purposive sampling involves selecting participants for a study based on some characteristic that you know they have. There is nothing random about their selection - it was done with intent. An advantage of this type of sampling is that it allows the researcher to quickly hone in on the target population. A disadvantage to this form of sampling is that researcher bias can creep in to influence results, if subjects are not chosen very carefully.
What are some advantages and disadvantages of multistage sampling?
a disadvantige is that a rocket gets disposed of after each flight
