Probability & Statistics Math Practice

About this grouping

Distinguish a conditional probability from an independent intersection, and a sample formula from a population formula. Read every stated condition.

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Each Start opens that topic’s available practice. This grouping does not launch a combined session or enroll you in a course.

• Basic probability rules

  Recall complements, unions and independent intersections.

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• Combinatorics formulas

  Combination, permutation, and two-stage counting relationships.

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• Expectation and variance formulas

  Expectation, variance, and second-moment relationships.

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• Mean formulas

  Recall population and sample mean formulas.

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• Covariance and correlation formulas

  Covariance, second-moment, and correlation relationships.

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• Small exact combination values

  Finding small exact combination values without listing every case.

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• Conditional probability

  Recall probability given that another event has occurred.

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• Binomial probability

  Recall the binomial probability formula and its conditions.

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• Bayes' theorem

  Recall Bayes’ theorem with its stated conditions.

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• Standard deviation relationship

  Recall standard deviation as the square root of variance.

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• Variance formulas

  Recall population and sample variance formulas.

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• Z-score

  Recall the standardized value of an observation.

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