Question Bank: Correlation

What type of correlation occurs when both variables move in the same direction?

Which of the following is an example of negative correlation?

Which relationship represents a perfect positive correlation?

A scatter diagram is primarily used to determine what?

What does a negative correlation indicate about two variables?

If the correlation coefficient between two variables is 0, what does this imply?

Which factor does NOT affect the measurement of correlation?

Which of the following is an example of a third variable that can affect correlation?

What kind of correlation does this scenario illustrate: 'As price increases, demand decreases'?

Which coefficient measures the strength and direction of a linear relationship between two variables?

What is correlation primarily used to measure?

A situation where two variables are correlated due to a third variable is known as what?

Which of the following scenarios best illustrates a negative correlation?

In which context is correlation most often applied?

What does it mean if two variables have a strong positive correlation?

What does a scatter plot with scattered points indicate about correlation?

In correlation analysis, what is an important distinction to be made?

What happens to the correlation coefficient if a significant outlier is introduced to a dataset?

Which of the following pair of variables might be an example of spurious correlation?

Which statement about correlation is FALSE?

If two variables are found to have a correlation coefficient of 0, what does this imply?

How can correlation be quantitatively expressed?

What type of correlation might exist between study time and exam scores?

What aspect of correlation is measured by the correlation coefficient?

Which of the following best represents a case of positive correlation?

If the correlation coefficient between two variables is +0.85, this indicates what about the relationship?

Which scenario best exemplifies the concept of causation rather than correlation?

Which factor can affect the correlation between two variables?

In correlation studies, what is the term for a variable that influences two other variables?

What does a scatter diagram primarily depict?

What does a correlation coefficient of -0.85 indicate?

Which of the following best describes positive correlation?

If the correlation coefficient is zero, what can be inferred?

What is Karl Pearson’s coefficient of correlation used to measure?

Which property of the correlation coefficient assures that its value remains the same even after adjusting the scale of data?

Which of these is a characteristic of Spearman’s rank correlation coefficient?

The range of values for the correlation coefficient is defined as:

In a scatter diagram showing perfect positive correlation, how are the data points arranged?

What does a high value of correlation (close to +1 or -1) signify?

What does a negative correlation imply about two variables?

A correlation of +0.6 between two variables suggests that they are likely to:

When should Karl Pearson’s coefficient not be used?

How does the correlation coefficient react to extreme values in the data?

If a scatter diagram displays no correlation, what will the shape look like?

In correlation, which scenario is true if one variable increases and the other shows no change?

How does the degree of closeness of points in a scatter diagram relate to correlation?

If you transform the data set by multiplying all values by -1, what happens to the correlation coefficient?

A high positive value of Karl Pearson's coefficient indicates:

When can we say that the correlation is perfect?

Which of the following methods would you use to analyze non-numerical data?

If the correlation coefficient is negative, which of the following is true?

What advantage does a scatter diagram offer before using correlation coefficients?

If two variables are perfectly correlated, what can be inferred about their behavior?

Which scatter diagram configuration indicates perfect negative correlation?

In practical applications, what is the significance of a high correlation coefficient?

The Spearman’s rank correlation coefficient is particularly useful for:

What does a low correlation coefficient (close to 0) indicate about two variables?

Why should a researcher always consider using a scatter diagram before computing correlations?

What is the range of the correlation coefficient (r)?

Which correlation method is preferred when variables cannot be precisely measured?

If the correlation coefficient (r) is 0, what does it indicate about the variables?

What does a positive correlation coefficient indicate?

Which correlation method can assess any type of relationship, not limited to linear?

When should you use rank correlation instead of simple correlation?

Why is the correlation coefficient preferred over covariance?

In which situation would rank correlation be deemed ineffective?

Does correlation prove causation between variables?

What is indicated by a correlation coefficient greater than 1 or less than -1?

In a scatter plot, which pattern reflects a strong positive correlation?

Which correlation coefficient would you use for ranked data?

What type of data is Pearson's correlation best suited for?

What is the main limitation of using correlation analysis?

What does a correlation coefficient value of 1 signify?

How is Spearman's rank correlation different from Pearson's correlation?

If the correlation coefficient between two variables is 0, what can be inferred?

When might Spearman's rank correlation be preferable to Pearson's?

In a study, the correlation coefficient between hours studied and exam scores is found to be 0.85. What does this imply?

If a researcher calculates a correlation coefficient of -0.65, what does this imply about the relationship between the two variables?

Why is it important to calculate the correlation coefficient in economic studies?

What scenario would be best to utilize Pearson's correlation coefficient?

If two variables have a correlation coefficient of -1, what does this indicate?

Which of the following is a common misconception about correlation coefficients?

Which is NOT an application of the correlation coefficient in economics?

What kind of data is needed to apply Pearson’s correlation coefficient?

What does it indicate if the correlation coefficient is close to -1?

In the context of Indian economic indicators, which pair of variables might demonstrate a positive correlation?