Statistics Flashcards: Developing Empirical Probability Distributions Expected Value

Study Developing Empirical Probability Distributions Expected Value in Statistics with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the expected value formula for a discrete random variable $X$ ?

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ANSWER

$E(X)=\sum x\,P(x)$ . Multiply each value by its probability and sum all products.

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Statistics: Expected Value

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What this deck covers

This deck focuses on Developing Empirical Probability Distributions Expected Value, giving you a quick way to review the definitions, rules, and examples that matter most for Statistics.

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Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 23Practice questions for this set

A spinner game is played 120 times. The observed counts are: land on 1 (18 times), land on 2 (27 times), land on 3 (33 times), land on 4 (42 times). Define the random variable

X

as the number landed on. Using relative frequencies from these data as estimated probabilities, what is the expected value of

X

based on the empirical distribution?

Choose an answer

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