An oceanographer, Dr. Aris, is investigating the linear relationship between seawater salinity levels $S$ and dissolved oxygen concentration $D$ across 18 hydrothermal vent samples. After performing her calculations, she determines the product moment correlation coefficient (PMCC) for the dataset.

Which of the following statements best describes her calculated result of $-1.42$?

• Definitely incorrect
• Probably incorrect
• Probably correct
• Definitely correct