Candy wondered if caffeine would affect the breathing rate of goldfish. She went to the store and purchased 10 goldfish of approximately the same age and size, identical containers, food, and caffeine tablets. In one container she placed 5 goldfish with no caffeine. In the other container she placed 5 goldfish with caffeine tablets dissolved in the water. She observed the goldfish behavior and counted the operculum (plate that covers gills) movements in both containers of fish.
How could the experimental design be improved?
2 answers
repeat the experiment several times, and statistically compare the results.
write a hypothesis
2 answers