Plz help Q3.1. Which of the following statements about good experiments is TRUE?

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Q3.1. Which of the following statements about good experiments is TRUE? 0 A good experiment should include all hypothesized causal factors in one experimental group. A good experiment must have at least three groups: one control group and two experimental groups. O A good experiment should exclude or suppress potentially confounding factors, if possible. OA good experiment should only include replication if the hypothesis has never been tested before. Submit Q3.2. Why is replication important to consider when designing an experiment? Replication allows you to test multiple independent variables in the same experiment. O Replication increases confidence that your results apply more widely, not just to specific cases. O Replication is necessary to introduce systematic variation into an experiment. Replication increases the chances that a rare result leads you to an erroneous conclusion Submit

Explanation / Answer

Answer 3.1. A good experiment should exclude or suppress potentially confounding factors, if possible.

Because these confounding variables may disrupt the accuracy of the experiment.

Answer 3.2. Replication increases confidence that your results apply more widely, not just to specific cases.

Replication reduces the variability in the experimental results. Thus, if variation is reduced that means significance and confidence level is increased.

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