Question

identify the controls and variables
smithers thinks that a special juice will increase the productivity of workers. he creates two groups of 50 workers and assigns each group the same task (in this case, theyre supposed to staple a set of papers). group a is given the special juice to drink while they work. group b is not given the special juice. after an hour, smithers counts how many stacks of papers each group has made. group a made 1,587 stacks. group b made 2,113 stacks.
homer notices that his shower is covered in a strange green slime. his friend barney tells him that coconut juice will get rid of the green slime. homer decides to test this out by spraying half of the shower with coconut juice. he sprays the other half of the shower with water. after 3 days of \treatment\ there is no change in the appearance of the green slime on either side of the shower.
identify the -

1. hypothesis
2. control group
3. manipulated (independent) variable
4. responding (dependent) variable
5. what should smithers conclusion be?
6. how could this experiment be improved upon?
7. what was the initial observation?

identify the -

1. control group
2. manipulated (independent) variable
3. responding (dependent) variable
4. what should homers conclusion be?

Explanation:

Step1: Identify Smithers' hypothesis

The hypothesis is that the special juice will increase the productivity of workers.

Step2: Determine Smithers' control group

Group B is the control group as they are not given the special juice.

Step3: Find Smithers' manipulated variable

The manipulated variable is the special juice (presence or absence).

Step4: Identify Smithers' responding variable

The responding variable is the number of stacks of papers made.

Step5: Make Smithers' conclusion

The special juice did not increase productivity as Group B made more stacks.

Step6: Suggest improvement for Smithers' experiment

Use a larger sample size, control for worker - skill levels, etc.

Step7: Identify Homer's initial observation

The initial observation is that his shower is covered in a strange green slime.

Step8: Determine Homer's control group

The half of the shower sprayed with water is the control group.

Step9: Find Homer's manipulated variable

The manipulated variable is the coconut juice (presence or absence).

Step10: Identify Homer's responding variable

The responding variable is the appearance of the green slime.

Step11: Make Homer's conclusion

Coconut juice did not remove the green slime as there was no change in its appearance.

Answer:

1. The special juice will increase the productivity of workers.
2. Group B
3. Special juice
4. Number of stacks of papers made
5. The special juice did not increase productivity.
6. Use a larger sample size, control for worker - skill levels, etc.
7. His shower is covered in a strange green slime.
8. The half of the shower sprayed with water
9. Coconut juice
10. Appearance of the green slime
11. Coconut juice did not remove the green slime.