Dr. Jalli wonders what antibacterial, or cleaning substance, kills the most bacteria. He designs an experiment to test four antibacterials by putting them onto colonies of bacteria and measuring how much of the bacteria is killed. His results from each of three trials are listed below:

Antibacterial % Bacteria Killed
1 65%
2 23%
3 18%
4 31%
Antibacterial % Bacteria Killed
1 72%
2 17%
3 21%
4 39%
Antibacterial % Bacteria Killed
1 75%
2 12%
3 18%
4 29%

From the information in the tables, which of the following is an appropriate conclusion?

Question

Dr. Jalli wonders what antibacterial, or cleaning substance, kills the most bacteria. He designs an experiment to test four antibacterials by putting them onto colonies of bacteria and measuring how much of the bacteria is killed. His results from each of three trials are listed below:

Antibacterial	% Bacteria Killed
1	65%
2	23%
3	18%
4	31%
Antibacterial	% Bacteria Killed
1	72%
2	17%
3	21%
4	39%
Antibacterial	% Bacteria Killed
1	75%
2	12%
3	18%
4	29%


From the information in the tables, which of the following is an appropriate conclusion?

anonymous · Answer

a Antibacterial 1 was the most effective at killing bacteria.
b  None of the antibacterials killed any bacteria.
c Antibacterials 2 and 3 were the most effective at killing the bacteria.
d All of the antibacterials had the same effectiveness at killing the bacteria.

anonymous · Answer

@YoungElk

anonymous · Answer

Well you can figure it out by process of elimination. You know b is incorrect beause they all killed some bacteria. Which other answers are wrong?