Question

jada noticed that her friends walked further and texted faster during the last 20 walks than they did during the first 20 walks. since both were faster, she predicts that the correlation coefficient of the line of best fit for the last 20 walks will be closer to -1 than the correlation coefficient of the line of best fit for the first 20 walks will be. do you agree with jada? explain your reasoning.

Explanation:

The correlation coefficient measures the strength and direction of a linear relationship. Just because the behavior (walking further and texting faster) was more pronounced in the last 20 walks doesn't mean the correlation for the first 20 walks will be closer to - 1. Correlation is based on the overall linear relationship within a data - set, and past behavior within one subset doesn't predict the correlation of another subset.

Answer:

No, I do not agree with Jada.