Question

Researchers collect data on 5,134 American adults younger than 60. They measure the reaction times (In seconds) of each subject to a stimulus on a computer screen and how manyyears later the subject died.The researchers are interested in whether reaction time can predict time to death (In years). When you make a scatterplot, the explanatory variable on the x axis.Which of the following is correct?1. can be either reaction time or time to death.2. Is the time of death.3. is the reaction time.

Answer 1

For this problem we need to tkae in count what is the interest question given by: 'The researchers are interested in whether reaction time can predict time to death (In years)'

So then our dependent variable would be the reaction time and the independent variable would be the time to death in years.

Then the best answer for this case would be:

3. is the reaction time.

Because on the x axis we have the independent / explanatory variable