Q.24A sociologist predicts that alcohol drinking will decrease people's reaction time while driving. In

Q.24

A sociologist predicts that alcohol drinking will decrease people's reaction time while driving. In

this study, what is the independent variable?

reaction time

alcohol drinking

driving

the sociologist

Q.25

You are a botanist and you are setting up an experiment to determine how a given species of plant grows in response to changes in the amount of fertilizer added to the soil. In this example, what is the independent variable?

Type of soil

Growth rate

Amount of fertilizer