Correlation and regression are concerned with:
a. the relationship between two qualitative variables
b. the relationship between two quantitative variables
c. the relationship between a qualitative and quantitative variable
d. none of the above
e. all of the above
in statistics, correlation denotes association between two quantitative variables.
In this case , We assume that the association is linear.
If one variable increases or decreases then other variable increase or decrease as following type
correlation in the same direction is known as a positive correlation. If one variable increases the other also increases and when one variable decreases the other also decreases.
And if one variable increases other decreases then correlation will be of negative type .
conclusion- option (b) is correct.
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