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Hypothesis Testing - Coggle Diagram
Hypothesis Testing
Hypothesis
Hypothesis testing
Statistical procedure used to evaluate a hypothesis using sample data
Statement or prediction about population
Population
Entire group that a researcher wants to study
Sample
Smaller group selected from population
Random Sample
Sample chosen so that every member of population has a chance of being selected
Inference
Conclusion about population based on sample data
Parameter
Numerical characteristic of a population
Prediction
What researchers expect to observe in the sample if the hypotheses is true
Critical Region
Set of extreme sample values that lead to rejecting the null hypothesis
Hypothesis Test
Statistical procedure used to evaluate a hypothesis about a population
Treatment
Condition or action applied to individuals to see if it causes a change
Normal Distribution
Bell shaped distribution of scores
Baseline Mean
Original average before treatment
Null Hypothesis
States that there is no effect or no change
Alternative Hypothesis
States that there is an effect or change
Alpha level
Level of significance used to define very unlikely outcomes
Level of Significance
Another name for alpha level
Test Statistic
A value used to evaluate the hypothosis
Type 1 error
When researcher rejects null hypothesis that is actually true
Type 2 error
When researcher fails to reject null hypothesis that is false