When both variables change in the same direction, then correlation is:
Positive
Negative
Multiple
Constant
Which is the example of negative correlation?
Age of husband and age of wife
Increase in cost of advertisement and increase in sales
Demand of a commodity may go down as a result of rise in prices
Price of commodity and amount of supply
Changes in the two variable if exactly proportional and in opposite direction are expressed as:
Perfect correlation
Perfect Positive
Positive correlation
Perfect negative correlation
Correlation between two or more variables can be:
Negative correlation
Linear correlation
Correlation
For the calculation of coefficient of correlation, following formula:
Spearman
Karl Pearson
Max D. Lorenz
Adam smith
There is no correlation when:
All the points lie on a straight line rising from left to right
All the points lie on a narrow band rising from left to right
All the points are scattered all over the graph.
When all the points are following a narrow band from left to right.
The other name of rank correlation is:
Karl Pearson's correlation coefficient
Scatter diagram
Liner relation
Spearman's correlation coefficient
If rxy = 0, then:
X increases with increase in Y
X increases with decrease in Y
X does not change with change in Y
Y does not change with change in X
The value of correlation coefficient is always:
More than zero
Between +1 and -1
Less than +1
Less than -1
The measure related to correlation in:
Arithmetic mean
Standard deviation
Range
Regression
