Which of the following is correct about correlation coefficient
A. The Pearson correlation is used to score variables
B. The Spearman correlation is used for nominal variable
C. The numerical size of the correlation ranges from -0.1 to +0.1
D. The Spearman correlation is used for internal variable
Choose the correct answer from the options given below:
1
A only
2
A and C only
3
A, B and D only
4
B, C and D only