Hospital floors are usually covered by bare tiles Carpets wo

Hospital floors are usually covered by bare tiles. Carpets would cut down on noise but might be more likely to harbor germs. To study this possibility, investigators randomly assigned 8 of 16 available hospital rooms to have carpet installed. The others were left bare. Later, air from each room was pumped over a dish of agar. The dish was incubated for a fixed period, and the number of bacteria colonies were counted. The response in this study is:

Solution

The response variable is the \"affected\" variable.

That means that the response variable is the NUMBER OF BACTERIA COLONIES IN THE INCUBATED DISH. [ANSWER]