Lecture 4 Chapter 5 Flashcards
What are descriptive statistics?
- Describe sample or population values based on collected data
What are the uses of inferential statistics?
-For significance testing
* Estimate population parameters from sample statistics
Why do you do significance testing?
-Determine if differences between groups or
relationships between variables are statistically significant
* Making inferences about population values from sample data that has been collected and analyzed
What does having a statistical significant difference or relationship mean?
Your observations are likely due to something other than pure “coincidence” or “chance”
What do you need to know to choose a inferential statistical test? 5 things
*The type of question being asked
* The number of variables in the question
* The independent and dependent variables
* The measures of each variable
* The research design
What table do you use for difference questions?
*Table 5.1 for 2 variable Difference questions
What table do you use for association questions?
Table 5.2 for 2 variable Association questions
What is between group design?
It involves selecting a sample of people and assigning each person to one of the levels of the IV
What type of design is when each person is assigned to one level of the IV
Between-group
What type of design is when different groups get different levels of the IV (e.g., IV = gender male/female)
Between-group
What type of design is the groups aren’t related or matched in a manner related to the DV
Between-group
What type of design is when each participant is assigned to all the levels of the IV
Within group
What type of design is when The same group gets diff levels of the IV?
Within group
What type of design is called repeated measures?
Within group
If DV is scale and assumptions of normality are markedly violated, use _______ tests.
non- parametric
