Question

how many variables should there be in a well - designed experiment? as many as possible 1 2 0 submit request answer part b what was an important limitation in the experiments shown in the video? there were too few subjects. in other words, the sample size was too small. the participants knew too much about the experimental design, and it affected the outcome there was too much bias on the part of the scientists conducting the research there were not enough variables in the experimental design

Explanation:

In a well - designed experiment, to clearly determine cause - and - effect relationships, there should be one independent variable that is manipulated while other factors are controlled. For the limitation question, a small sample size can lead to unreliable results as it may not accurately represent the population.

Answer:

Part A: 1
Part B: There were too few subjects. In other words, the sample size was too small.