Intro to Samples
What is a sample?
A portion or subset of a population
Which sampling method uses random selection?
Probability sampling
What is a benefit of simple random sampling?
It's simple to do
What is a benefit on convenience sampling?
Can serve as an useful and practical way to find names that are otherwise too hard to obtain.
What is the best type of sample?
Representative
____ are done to describe, compare, and predict knowledge, attitudes, and behavior
Surveys
Name the four types of probability samples
Simple Random, Stratified Random, Systematic, and Cluster
What is an issue of convenience sampling?
There is a potential for bias
Why is sampling beneficial?
- It is efficient and precise
- Samples can be studied quickly than a target population
- Less expensive to assemble
- Won't have to spend as many resources
Give an example of an inclusion criteria
Can literally say anything
What is one issue of the stratified random sampling?
You must calculate sample sizes for each subgroup; can be time consuming
12 -20
Arlene Fink said, "Be sure that is a _____ representation of the target population"
faithful
Why limit the number of participants in a survey?
It requires additional resources, time, and money to administer, analyze, and interpret the excess data.
What is an issue that can occur in systematic sampling?
One must look out for recurring patterns within the sampling frame
Give an example of quota sampling
anything