Question

A correlation of -0.75 between number of hours worked per week and stress tells you that as hours of work decreases stress also decrease

true or false

If we measure the amount of rainfall in a particular season and the rate of growth of the grass in a particular area and find a positive correlation of 0.83, we can say with some certainty that rain causes grass to grow.

true or false

Knowing the strength of a relationship between two variables, such as GPA and Success in Graduate School, allows the prediction of one variable (say success) based on the level of the other (GPA)

true or false

Answer 1

False

As the correlation is negative it implies that as the number of hours worked per week decreases the stress increases, therefore this statement is false.

True

As the correlation between rain and rate of growth of grass is positive it implies that as rain increases the rate of growth increases hence this statement is true.

True

Suppose the relationship among two variables is known then we can certainly predict that as one variable increases the other would decrease or increase and vic versa.

Thank you !!!