Question

4. Scatter Diagram

A. Why do we use a scatter diagram when analysing data?

B. On a scatter diagram, what is a positive relationship?

C. What does it mean when it is said that the relationship is strong?

Answer 1

4.

A. Scatter diagrams are used to compare two data sets to assess whether there is any correlation between them. By plotting the data, visually it would tell if it is a positive, negative or no relationship between them.

B. A positive correlation would mean an increasing trend and move in a same direction. An increase in one variable would make other variable to increase

C. Strong relation means there is a visibly clear upward trend from left to right and the data points would form a line