Topic 11 A: Correlation Flashcards
1
Q
To find out the relationship between 2 continous variables, you cant use ——, you need to use ——-
A
- ANOVA
- Correlation and regression
2
Q
Correlation is a
A
linear relationship between two continous variables (as one variable goes up, the other goes up or down at a continous rate)
3
Q
Scatter plots (2)
Used to+ can help
A
- Used to plot correlational data
- Can help to see whether a linear relationship exists between variables
4
Q
Negative correlation
A
As X increase, Y decrease
5
Q
Positive correlation
A
As X increases, Y increases
6
Q
More clustered on a line means
A
stronger correlation
7
Q
Correlation Coefficient
A
- A measure of the strength and the direction of a linear relationship between 2 variables
8
Q
r
A
sample correlation coefficient
9
Q
p
A
population correlation coefficient
10
Q
n
A
Number of data pairs
11
Q
the range of the correlation coefficient is
A
-1 to 1
12
Q
correlation r value effect size
A
13
Q
Hypothesis testing for correlations
A
- To determine whether two variables are significantly correlated at a specified level of significance
14
Q
Hypothesis testing for correlations H0 and Ha
A
15
Q
Df
A
n-2
16
Q
Correlation t-test rejection Ho phrasing for 2 tail:
A
