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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:

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Given the details of the study carried out on Hospitals to study the possibility that carpers might be more likely to harbor germs, in which air from rooms with carpet and those without carpet was pumped over a dish of agar, and the number of bacteria colonies were counted after incubating the dish for a fixed period of time. The response in this study is number of bacteria colonies in a dish.

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