Final answer:
The correct statement about the correlation reported as r = -0.7 is that the correlation is negative, indicating an inverse relationship between the variables.
Step-by-step explanation:
The value of a correlation reported by a researcher to be r = -0.7 is indicative of a negative correlation. This means that as one variable increases, the other variable tends to decrease, and vice versa. The correlation coefficient r ranges from -1 to +1, with negative values indicating a negative relationship and positive values indicating a positive relationship. Thus, statements claiming the correlation is positive or zero are incorrect, and the correct statement is that the correlation is negative.