Correlation Flashcards
A correlation is a statistical technique to measure and describe the relationship between two typically ______ variables
Continuous
A _____ is a figure depicting the correlation between two variables
Scatterplot
- This is indicated by the sign of the correlation
- This piece of information is only available by looking at the scatterplot
- This is indicated by the coefficient, and is a measure of how tightly scores sit on the correlation line, or how consistently the correlation describes the relationship between the two variables for the participants
- Direction
- Form
- Strength
Pearson’s correlation measures the relationship between two variables that are both _____
Interval or ratio
Spearman’s correlation measures the relationship between two variables that are both ______
Ordinal
This correlation measures the relationship between the two variables while controlling for the influence of a third variable
Partial correlation
The correlation coefficient measures the extent to which variables covary _____ relative to the extent to which they covary _____
together; separately
This indicates the proportion of variance in one variable accounted for by the other variable
r2
What is indicated by a positive value for a correlation?
increases in X tend to be accompanied by increases in Y
The numerical value for a correlation
can never be greater than 1.00 and can never be less than -1.00
The results from a research study indicate that adolescents who watch more violent content on television also tend to engage in more violent behavior than their peers. The correlation between amount of TV violent content and amount of violent behavior is an example of ______
a positive correlation
A researcher measures IQ and weight for a group of college students. What kind of correlation is likely t be obtained for these two variables?
a correlation near zero
