Which of the following indicates the strongest correlation?

-.90

-.60

+.40

+.80

A researcher finds a correlation of +.90 between two variables. Assuming the correlation coefficient was calculated correctly, which of the following is definitely not true?

	The variables may be causally related
	Ability to make predictions for these variables is good
	A third variable may be present that explains the correlation
	As values on one measure increase, values on the other measure decrease