1 One variable increases while another variable decreases Wh

1) One variable increases while another variable decreases. Which of the following describes this relationship?

negative correlation

maximum correlation

zero correlation

positive correlation

2) Choose the number that represents a perfect correlation.

0

1.00

100.00

10.00

3) Choose the number that represents no correlation.

-100

10

100

0

4) A researcher measures IQ and weight for a group of college students. What kind of correlation is likely to be obtained for these two variables?

a positive correlation

a negative correlation

a correlation near zero

a correlation near one

Solution

1) When the increase in one variable results in the decrease of other variable or when the decrease in one variable results in the increase of other variable then the two variables are said to have negative correlation.

2) The perfect and positive correlation is is represented by 1 as the value of correlation lies between -1 and 1.

3) When no correlation exists between two variables then their correlation is represented by 0.

4) As per most of the research it is found that higher is the weight the lower is the IQ, thus the correlation between IQ and weight is most likely to be negative.