Question

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. The researchers grew one type of bacteria in twenty-four identical covered petri dishes. Then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. They left the remaining six petri dishes closed as a control group. When the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. The researchers concluded that not using any hand sanitizer would lead to the least bacterial growth.

Answer 1

Answer: The control group was not treated the same as the experimental group.

Explanation: Edu2021 gang why u forgot questions XD

Answer 2

The question was incomplete as the question part was missing. however, the correct question is as follow:

Which statement best explains why the researchers’ conclusion was not justified?

The experiment tested too many variables.

The control group was not treated the same as the experimental group.

The sample size of twenty-four petri dishes is not large enough.

The single type of bacteria is not adequate to make any conclusions.

Answer:

The correct answer is - The control group was not treated the same as the experimental group.

Step-by-step explanation:

In this research, the researchers made two groups experimental group and control group, these groups are meant to get the same treatment except the variable to be measured so they can compare the result.

Here the experimented group was left open while the control group was left closed which lead to the fact the bacteria propagate through the air and not the hand

Thus, the correct answer is - The control group was not treated the same as the experimental group.