Demerits of Scatter Diagram
1. Rough Measure: Scatter diagram only gives a rough idea of the degree and nature of correlation between the given two variables. Therefore, it is only a qualitative expression rather than a quantitative expression.
2. Non-mathematical Method: Like other methods of correlation, Scatter Diagram Method does not indicate the exact numerical value of correlation.
3. Unsuitable for Large Observations: If there are more than two variables, it becomes difficult to draw a scatter diagram.
Also Read:
Correlation: Meaning, Significance, Types and Degree of Correlation
Methods of Measurements of Correlation
Spearman’s Rank Correlation Coefficient in Statistics
Karl Pearson’s Coefficient of Correlation | Assumptions, Merits and Demerits
Karl Pearson’s Coefficient of Correlation | Methods and Examples