The difference in the percent of women who became pregnant in the two groups is statistically significant. Explain what this means to someone who knows little statistics.

Randomization, replication, and local control are the guiding principles of experimental designs. These guidelines provide a reliable test of significance.

What are the three principles of experimental design briefly explain how each of them reduce experimental error?

To prevent systematic error and to manage random error, the three fundamental principles of randomization, replication, and local control are used.
Randomization is the process of allocating the treatments or factors to be tested to the experimental units in accordance with established rules or probabilities.

How many principles of experimental design are there?

Three key tenets of experimental design are as follows: Randomization: Giving experimental units different treatments at random.

Replication: Applying the fundamental strategy to numerous experimental units repeatedly.

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