Question

In general, the weight of an animal increases with age.

What could be the correlation between the weight and age of all animals?

A)-1
B)-0.65
C)0.09
D)0.65

Answer 1

D 0.65 is right answer

Answer 2

A correlation value of 0.65 that indicates a moderate positive linear relationship can be used to describe relationship between weight and age of animals.

Explanation:

We are given the following information in the question:

Correlation:

• Correlation is a technique that help us to find or define a relationship between two variables.
• It is a measure of linear relationship between two quantities.
• A positive correlation means that an increase in one quantity leads to an increase in another quantity
• A negative correlation means with increase in one quantity the other quantity decreases.
• +1 tells about a a perfect positive linear relationship and −1 indicates a perfect negative linear relationship.
• Values between 0 and 0.3 tells about a weak positive linear relationship, values between 0.3 and 0.7 shows a moderate positive correlation and a correlation of 0.7 and 1.0 states a strong positive linear relationship.
• Values between 0 and -0.3 tells about a weak negative linear relationship, values between -0.3 and -0.7 shows a moderate negative correlation and a correlation value of of -0.7 and -1.0 states a strong negative linear relationship.

Since, the weight of an animal increases with age a correlation value of 0.65 that indicates a moderate positive linear relationship can be used.