The superpower status of the United States is currently threatened by which of the following rising powers?

The experimental manipulation in reversal designs

A) occurs only in the control group. B) occurs after baseline measurements have been taken. C) occurs naturally and therefore is not a true manipulation. D) Both A and B

If the pattern of dots on a scatterplot runs from upper left to lower right what does this indicate?

a. that the relationship is strong b. that the relationship is weak c. that it is a positive relationship d. that it is a negative relationship