Applied Research Methods (Day 8 Sampling)
Under what circumstances is a stratified random sample the most appropriate sampling method?
- When you're taking equal groups (ex. Five from each sample) when you're interested if the program is equally effective regardless of who the sample is. - If you're interested in if the processes are the same in the underrepresented groups.
Which of the following in NOT required for a simple random sample from a population of 20 individuals?
After 20 selections, each individual must have been selected exactly one time.
A major goal of research is to ____________ from a small group of participants included in a study to the larger group from which they came.
Generalize
Dr. Near conducts an experiment on memory using participants above the age of 65. All people above the age of 65 would make up the...
Population
If your primary concern is that the composition of your sample should accurately reflect the composition of the population, then you should use...
Proportionate stratified sampling
When a sample has the same characteristics as the target population, the sample is said to be a(n) ______________.
Representative sample
A researcher is interested in the television viewing preferences for of adolescent boys and selects a group of 25 boys to participate in a research study. The group of 25 boys is a __________.
Sample
Just by chance it is possible to obtain a sample with characteristics that are very different from the population, however it is more likely that this kind of sample is the result of...
Selection bias
A class consists of 20 girls and 12 boys. The names of all the students in a class are listed on separate pieces of paper. The teacher places all the boys' names in one hat, all the girls' names in another hat and mixes them thoroughly before reaching in to draw out five names from each hat. The teacher is using.....
Stratified random sampling
A professor teaching an introductory psychology class of 200 obtains a sample of 25 students by selecting every 8th name from the class list. The professor is using...
Systematic sampling
The group of individuals from which researchers actually select participants for research studies is called....
The accessible population
A cluster sample usually does not qualify as a true random sample because
The individuals within each group are usually not independent
Why are larger samples likely to be more representative than smaller samples?
The law of large numbers
Typically, researchers plan to generalize their results to the entire group of individuals defined by their specific interests. This entire group is called....
The target population
A large sample is probably more representative than a small sample.
True
