Spearman's Rho correlation co efficient

Question 1

When is this test used?

Answer 1

Ordinal level data in a correlational study to find a significant positive or negative correlation

Question 2

Co variables

Answer 2

2 variables that have ordinal data of each to see if there is a significant relationship affecting each other

Question 3

Ranking scores for each co variable

Answer 3

Rank lowest score as 1 and put into a new column then repeat for next lowest score
If ranks are tied, give midpoint of score

Question 4

Difference between rank values

Answer 4

For each difference in rank values of co variable for every participant

Question 5

What is done with the difference between rank values?

Answer 5

squared to remove negative sign

Question 6

Calculate the correlation co efficient

Answer 6

1 -
[(6 x all the squared differences added together)
divided by
(number of participants x number of participants² -1)]

Question 7

Symbol for correlation co efficient

Answer 7

Rₛ

Question 8

Critical value for correlation co efficient

Answer 8

Read off value from number of participants at a significance level of p<0.05

Question 9

How do we know if we have a significant correlation ?

Answer 9

If calculated value of Rₛ is bigger than critical value of Rₛ (ignoring the sign) Then at this level of significance there is significant correlation

Question 10

Is N the number of pairs or total number of participants?

Answer 10

Number of pairs