Data Analysis Tests Flashcards
What does correlation show?
The RELATIONSHIP between TWO variables
What does “r” describe?
The DIRECTION & MAGNITUDE of the relationship
Negative “r” value means…
variables are moving in opposite directions
Positive “r” value means…
variables are moving in the same direction
What levels of data can be used with correlation?
ordinal, interval, and ratio
What does regression focus on?
Prediction
What does chi-square determine?
whether two variables are independent or related
What levels of data can be used with chi-square?
nominal or ordinal
Chi-square shows the ratio of…
expected and observed
What level of data can be used in a t-test?
Interval or ratio
Independent t-test compares…
The means of two groups–looks for the differences
Dependent (paired) t-test compares…
The means of two groups BEFORE AND AFTER an intervention
ANOVA (f statistic) shows…
The difference in 3+ groups
What level of data can be used in ANOVA?
Interval or ratio
After doing ANOVA, a post-hoc analysis can be done to show…
Specifically which group differed
