Question

Which experiment would most likely contain experimental bias? A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands. B. A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions. C. A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same temperature. D. A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each.

Answer 1

A

Step-by-step explanation:

A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands. - Because the company will have a financial interest in this study (they want their own medicine to be the best in order to make more money) there is the possibility for experimental bias. Ideally, this test should be carried out by an independent lab with nothing to gain from the results

B. A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions. - This is good experimental design, everything seems to be exactly the same apart from the antibiotics being tested.

C. A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same temperature. - This is good experimental design and there doesn't seem to be any differences that would cause bias.

D. A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each. - This is good experimental design. The flowers are all in the same location. We assume the only difference is the type of flowers