What is the best way to determine whether or not there is a statistically significant linear relationship between two quantitative variables?
A) Compute a regression line from a sample and see if the sample slope is 0.
B) Compute the correlation coefficient and see if it is greater than 0.5 or less than -0.5.
C) Conduct a test of the null hypothesis that the population slope is 0.
D) Conduct a test of the null hypothesis that the population intercept is 0.

Question

Quizplus · Accepted Answer

Conducting a test of the null hypothesis that the population slope is 0 is the best way to determine if there is a statistically significant linear relationship between two quantitative variables. This method directly assesses whether the observed relationship could occur by chance if there were no actual relationship in the population.

What Is the Best Way to Determine Whether or Not