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:

What decision were made by the first congress during its first year that shape the future of the government

In the spring of 1989, thousands of protesters gathered in tiananmen square in beijing, china. they rallied around a plaster statue that resembled the statue of liberty which they called “the goddess of democracy.” these protestors were seeking a) united states assistance in gaining better health care. b) economic reforms which would allow more chinese exports. c) the boycott of the future olympic games scheduled for beijing. d) political reforms to allow more freedom of speech and political representation.

Which steps are important when designing and conducting a scientific experiment? hide the results from fellow scientists. identify the independent variable. eliminate all dependent variables. address any confounding variables. form a non-falsifiable hypothesis.