### Home > CCA > Chapter 7 > Lesson 7.1.2 > Problem 7-29

Scientists hypothesized that dietary fiber would impact the blood cholesterol level of college students. They collected data and found with a scattered residual plot. Interpret the scientists’ findings in context.

The math note in your textbook states: The **correlation coefficient**, *r*, is a measure of how much or how little data is scattered around the LSRL; it is a measure of the strength of a linear association. The correlation coefficient can take on values between or

*, the association is perfectly linear. There is no scatter about the LSRL at all. A positive correlation coefficient means the trend is increasing (slope is positive), while a negative correlation means the opposite. A correlation coefficient of zero means the slope of the LSRL is horizontal and there is no linear association whatsoever between the variables.*

What does a negative

*value mean? How does that definition apply to this situation?*