If an investigator subtracted 50 millilitres of a cleaning concentrate from its easily recognized container and then observed how this change affected sales of the cleaner, the investigator would be engaged in which of the following?

Question

Quizplus · Accepted Answer

This is an example of experimental research as the investigator is manipulating an independent variable (subtracting 50 millilitres of cleaning concentrate) to observe its effect on sales, while keeping other variables constant.

If an Investigator Subtracted 50 Millilitres of a Cleaning Concentrate