Correlation
What does correlation measure?
If both variables move in the same direction, the correlation is:
The value of Karl Pearson's coefficient of correlation always lies between:
If the value of correlation coefficient is zero, it indicates:
Which of the following methods is a graphical method of studying correlation?
Spearman's Rank Correlation Coefficient is mainly used when:
If all points on a scatter diagram lie on a straight line directed from lower left to upper right, the correlation is:
Correlation does not imply:
What is the value of Spearman's rank correlation coefficient when ranks are identical?
In a scatter diagram, if the plotted points are scattered randomly with no specific pattern, the correlation is:
Which statistical measure is considered the best algebraic measure for correlation?
If r = -0.85, the relationship between the two variables is:
What happens to the correlation coefficient if a constant is added to each observation of a variable?
Which of the following is NOT a type of correlation based on the direction of change?
If the ratio of change between two variables is constant, the correlation is called:
The formula for Spearman's rank correlation coefficient includes which of the following terms?
When two variables move in opposite directions, the correlation is:
What is the main limitation of Karl Pearson's correlation coefficient?
If the correlation coefficient 'r' is +1, the scatter diagram will show points:
Which of the following is true regarding properties of correlation coefficient?