Question

bart believes that mice exposed to microwaves will become extra strong (maybe hes been reading too much radioactiveman.) he decides to perform this experiment by placing 10 mice near a radio for 5 hours. he compared these 10 mice to another 10 mice that had not been exposed. he testes the mice by placing a heavy block of wood in front of the mouse. he found that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same. 12. what was barts hypothesis? identify the 13. control group 14. manipulated (independent) variable 15. responding (dependent) variable 16. how could barts experiment be improved? krusty was told that a certain itching powder was the newest best thing on the market, it even claims to cause 50% longer - lasting itches. interested in this product, he buys the itching powder and compares it to his usual produce. one test - subject (a) is sprinkled with the original itching powder, and another test - subject (b) is sprinkled with the experimental itching powder. subject a reported having itches for 30 minutes, subject b reported to have itches for 10 hours. identify the 17. control group 18. manipulated (independent) variable 19. responding (dependent) variable 20. what should krustys conclusion be?

Explanation:

1. Bart's hypothesis is that mice exposed to microwaves will become extra strong.
2. For Bart's experiment, the control group is the 10 mice that had not been exposed to microwaves.
3. The manipulated (independent) variable in Bart's experiment is the exposure to microwaves.
4. The responding (dependent) variable in Bart's experiment is the strength of the mice (ability to push the block).
5. Bart's experiment could be improved by increasing the sample size, repeating the experiment multiple times, and controlling for other variables like diet and exercise of the mice.
6. For Krusty's experiment, the control group is the test - subject sprinkled with the original itching powder.
7. The manipulated (independent) variable in Krusty's experiment is the type of itching powder (new vs original).
8. The responding (dependent) variable in Krusty's experiment is the duration of the itches.
9. Krusty's conclusion should be that the new itching powder causes longer - lasting itches as subject B (with new powder) had itches for 30 minutes while subject A (with original powder) had itches for 10 hours.

Answer:

1. Mice exposed to microwaves will become extra strong.
2. 10 mice not exposed to microwaves.
3. Exposure to microwaves.
4. Strength of the mice (ability to push the block).
5. Increase sample size, repeat experiment, control other variables.
6. Test - subject with original itching powder.
7. Type of itching powder (new vs original).
8. Duration of the itches.
9. The new itching powder causes longer - lasting itches.