Show:
Stats facts
Sampling
Research Designs
Research Threats
Show me the technique!
100
p<.05
What is the standard for statistical significance?
100
the group we want to study (N)
What is the population?
100
Looks at a limited number of subjects with in-depth examination.
What is a case study?
100
History
What is a threat to internal validity due to external events going on during the study that effects the findings?
100
The difference between boys' and girls' choices in movie genres
What is a Spearman Rho correlation?
200
r = 0.7 - 1.0
What is the range for a strong Pearson correlation?
200
select every 3rd name on a list
What is a systematic random sample?
200
Explores the relationship between 2 independent variables
What is a correlation?
200
Experimental mortality
What is a threat to internal validity caused by the loss of subjects?
200
The difference in monthly computer usage time between third graders in the US and in China
What is a t-test?
300
Spearman Rho
What is a measure for relationships using non-paramteric data?
300
smaller group meant to represent the population (n)
What is the sample?
300
Must have three conditions: randomization of subject groups, treatment and control group.
What is experimental?
300
Testing
What is the threat to internal validity caused by the test-retest effect where there is no control group?
300
A teacher uses this to determine the performance of her students compared with the national norm
What is a percentile rank?
400
Percentages, percentiles, mean, and standard deviation
What are examples of descriptive statistics?
400
focus on a group of participants located together to represent the larger population (for convenience)
What is cluster sampling?
400
Contains a treatment and a control group but lacks random assignment of subjects
What is quasi experimental?
400
Instrumentation
What is the threat to internal validity caused by the lack of reliability or validity of the data-gathering device?
400
In addition to the mean, a principal wants to examine the dispersion measure of his nine grade students' reading scores
What is standard deviation?
500
chi square
What is the method used to test differences using non-parametric data?
500
everybody in the group has an equal chance of being selected
What is a simple random sample?
500
Differences between groups after they are already that way; aka causal comparative research
What is ex post facto?
500
Regression effect
What is the threat to internal validity caused by extreme scores tending to move toward the center (or average) of the norm curve?
500
Students with larger feet are smarter
What is a Pearson correlation?