Test for correlation - Spearman Rho + Pearsons R Flashcards
1
Q
When would you use Spearman’s Rho test?
A
1) test for correlation
2) ordinal data (1 or both co variables)
3) correlational design
2
Q
What is ‘Rho’?
A
correlation coefficient
3
Q
When would Rho be significant?
A
observed value > critical value
4
Q
how do you find critical value of Spearman’s Rho?
A
one tailed / two tailed
Probability
no. participants (no degrees on freedom)
5
Q
When would you use Pearson’s R test?
A
1) test for correlation
2) interval data (both)
3) correlation design
6
Q
Is Pearson’s R parametric or non-parametric?
A
parametric
7
Q
define parametric
A
assume theres normal distribution
8
Q
how do you work out d.f for Pearson’s R?
A
n - 2
no.participants - 2
9
Q
When would observed value be significant?
(Pearson’s R) §
A
observed value > critical value
