Competency Exam Question of the Day

"When faced with daunting challenges,
do a little every day."

Today's Question

Define a **random variable**, a **random vector**, and a **random process**. Name some of the significant statistical properties of each. Discuss when it is and is not appropriate to model physical systems with these mathematical objects.

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About

A new question will be selected each day at midnight UTC. You can submit your answer (in markdown) by logging in and typing your answer below the prompt. Questions will be related to electrical engineering for now, but might be subject to change in the future. If you have a particularly good answer to a question, I'll give you kudos or something.

My friend Daniel wanted me to make this feature so that he could study for his doctoral competency exam in electrical engineering.

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