Question

Design an experiment. Identify the explanatory and response variables. Describe the population being studied and the experimental units. Explain the treatments that will be used and how they will be assigned to the experimental units. Describe how blinding and placebos may be used to counter the power of suggestion.

Short answer

The disruption in driving caused by texting will be the explanatory variable, and the response variable will be the amount of seconds it takes for drivers to reply.

Step-by-step solution

Introduction

It's easy to tell the difference between explanatory and response variables: The intended cause is an explanatory variable that explains the outcomes. A response variable is the expected effect, and it responds to other variables.

Explanation

ExperimenttoseeifthenumberofhoursspentstudyingaffectsSATstudents'examscores.

Numberofstudyhoursisanexplanatoryvariable.

Examscoreisaresponsevariable.

StudentswhohavetakentheSAT

$100$SAT students were chosen as experimental units.

Treatment:

Variousamountofhours:

$2$hours, $4$hours, and $6$hours are the lengths of time available.

The examiner is blinded as to which student spent how many hours studying.