PLTW Principles of Engineering (POE) Practice Exam

In the context of probability, an experiment is defined as an activity that produces observable results. This concept is pivotal because, in probability theory, experiments are often designed to test hypotheses or understand the likelihood of various outcomes. For instance, flipping a coin, rolling a die, or conducting a survey are all examples of experiments that yield observable results, which can then be analyzed to assess probabilities.

The observable nature of the results is what distinguishes an experiment from purely theoretical considerations. In probability, it is essential to conduct experiments to gather data that can be analyzed statistically, allowing for a deeper understanding of the underlying randomness and probabilities of different events.

Other options may refer to aspects related to probability, but they do not encapsulate the definition of an experiment as effectively. For example, simply making a singular chance observation does not constitute an experiment, as it lacks the systematic approach typically involved. Similarly, theoretical calculations do not involve the direct testing of hypotheses through activities producing observable outcomes, nor does a description of random outcomes capture the proactive nature of conducting an experiment. Thus, the characterization of an experiment as an activity with observable results is the most accurate and comprehensive.