Image Based Question – 74303

A scatter diagram was plotted as shown below to study the relationship between two quantitative variables. What is the correct interpretation?

A. There is correlation between the two variables and the Pearson’s coefficient is 1

B. There is correlation between the two variables and the Pearson’s coefficient is 1

C. There is no correlation between the two variables

D. There is no relation between the two variables

Correct Answer » C Explanation

Ans: C. There is no correlation between the two variables

(Ref. Park 24/e p889, p852)

• Given graph – No correlation between the two variables.

First half of graph:

• Slope is close to +1.

Second half of graph:

• Slope is close to –1.

Interpretation:

• Little relation between two variables.
• No overall definite positive or negative correlation between two variables.