Spearman’s Rho Flashcards
1
Q
What are three assumptions of Pearson’s r?
A
- Interval or ratio data 2. X & Y normally distributed 3. Linear relationship
2
Q
Why use spearman’s rho? 3
A
- A variable is measured using ordinal scale OR a variable must be recoded to ordinal scale because: 2. Extreme scores 3. Monotonic relationship
3
Q
What is a monotonic relationship?
A
Variables change in the same direction but not always at the same rate. (Eg: ceiling effect)
4
Q
When can spearman’s rho be evaluated for significance?
A
When N>30.