A study compared the body weight (in Kg) and the brain weight (in grams) for a s

Question

A study compared the body weight (in Kg) and the brain weight (in grams) for a sample of 20 mammals. It was determined that the linear correlation coefficient is 0.099. What is the value of the correlation coefficient indicating?

a) Brain weight and body weight are positively correlated. As body weight increases, brain weight is also increasing.

b) Brain weight and body weight are negatively correlated. As body weight increases, brain weight is decreasing.

c) Brain weight and body weight are not correlated. As body weight increases, brain weight tends to remain the same.

d) Brain weight and body weight are positively correlated. As body weight increases, brain weight is decreasing

Explanation / Answer

Although the value of linear correlation coefficient is positive, it is very small. Hence, the correlation between body weight and brain weight is very weak.

So, we can conclude that Brain weight and body weight are not correlated. As body weight increases, brain weight tends to remain the same.

Correct answer is Option-C

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