Research Methods- Correlations and Distributions Flashcards
1
Q
What is correlation?
A
A measure of the relationship between two variables
2
Q
What is a correlation coefficient?
A
A number between +1 and -1
3
Q
What does a correlation coefficient show?
A
How closely variables are linked and the type of correlation
4
Q
What is a positive correlation?
A
As one variable rises, so does the other
5
Q
What is a negative correlation?
A
As one variable rises, the other one falls
6
Q
What is a zero correlation?
A
Two variable aren’t linked
7
Q
What are 3 advantages of correlational research?
A
- Doesn’t involve controlling any variables so can do it without a controlled experiment
- Good for future research
- Can be used to test for reliability and validity
8
Q
What are 2 disadvantages of correlational research?
A
- Can’t establish cause-and-effect relationships
- Have to use a significance test
9
Q
What is a normal distribution?
A
Symmetrical about the mean
10
Q
What is a positive skew?
A
Data is clustered around the lower end of the data set
11
Q
What is a negative skew?
A
Data is clustered around the higher end of the data set
