Question 1

Which of the following statements about the correlation coefficient is true?

Accepted Answer

The correlation coefficient ranges from -1 to 1.

Answer

It measures the strength of the relationship between two variables.

Answer

A value of 0 indicates a perfect positive correlation.

Answer

It can only be positive.

Question 2

What does a correlation coefficient of 0 signify in a data set?

Accepted Answer

There is no linear relationship between the variables.

Answer

The variables are perfectly positively correlated.

Answer

The data set has a strong non-linear relationship.

Answer

There is a perfect negative correlation.

Question 3

If a scatter plot shows a downward trend, what can be inferred about the correlation coefficient?

Accepted Answer

The correlation coefficient is negative.

Answer

The correlation coefficient is greater than 1.

Answer

The correlation coefficient is positive.

Answer

The correlation coefficient is zero.

Question 4

If the correlation coefficient between two variables is -0.85, what can be inferred about the relationship between these variables?

Accepted Answer

There is a strong negative linear relationship between the variables.

Answer

There is a strong positive linear relationship.

Answer

There is no linear relationship.

Answer

There is a weak positive linear relationship.

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