Correlation and regression analysis

1) Hello,what does it mean by qualitative ordinal?Can you give examples.i do not really understand

2) What are the differences between qualitative and qualitative ordinal?Can you give examples and the difference

3) Does it mean that we cannot consider qualitative variables in spearman rank correlation?

4) I am confused.weight and age are quatitative variables right?so,why we use pearson product moment of correlation instead of spearman rank correlation?can you explain.

ORRELATION & REGRESSION ANALYSIS ossion endent CORRELATION COEFFICIENT Spearman Rank Correlation analysis variables Correlation @coefficient variable 6 > (di) 2 r n(n 2 - 1) ar olt is a non-parametric measure of correlation. This procedure makes use of the two sets of ranks that may be assigned to the sample values of x and Y. Spearman Rank correlation coefficient could be computed in the following cases: Both variables are quantitative. Both variables are qualitative ordinal. X One variable is quantitative and the other is qualitative ordinal