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Mean (expected value) of a discrete random variable | AP Statistics | Khan Academy

video
  • Content location → Random variables
    EvidenceConnection evidence is not yet available in this language.
  • Content location → Random variables
    EvidenceX is defined as the number of workouts in a given week. Its possible values are listed in the table as 0, 1, 2, 3, and 4, with corresponding probabilities 0.1, 0.15, 0.4, 0.25, and 0.1.
  • Content location → Expectation
    EvidenceConnection evidence is not yet available in this language.
  • Content location → Expectation
    EvidenceThe clip introduces the expected value of a discrete random variable and writes it as E(X). This quantity is described as giving the expected number of workouts in a week.

Random variables

concept
  • Explanation → Random variables
    EvidenceConnection evidence is not yet available in this language.
  • Explanation → Random variables
    EvidenceX is defined as the number of workouts in a given week. Its possible values are listed in the table as 0, 1, 2, 3, and 4, with corresponding probabilities 0.1, 0.15, 0.4, 0.25, and 0.1.

Random variables

segment
  • Content location → Mean (expected value) of a discrete random variable | AP Statistics | Khan Academy
    EvidenceX is defined as the number of workouts in a given week. Its possible values are listed in the table as 0, 1, 2, 3, and 4, with corresponding probabilities 0.1, 0.15, 0.4, 0.25, and 0.1.
  • Explanation → Random variables
    EvidenceX is defined as the number of workouts in a given week. Its possible values are listed in the table as 0, 1, 2, 3, and 4, with corresponding probabilities 0.1, 0.15, 0.4, 0.25, and 0.1.

Expectation

concept
  • Explanation → Expectation
    EvidenceConnection evidence is not yet available in this language.
  • Explanation → Expectation
    EvidenceThe clip introduces the expected value of a discrete random variable and writes it as E(X). This quantity is described as giving the expected number of workouts in a week.

Expectation

segment
  • Content location → Mean (expected value) of a discrete random variable | AP Statistics | Khan Academy
    EvidenceThe clip introduces the expected value of a discrete random variable and writes it as E(X). This quantity is described as giving the expected number of workouts in a week.
  • Explanation → Expectation
    EvidenceThe clip introduces the expected value of a discrete random variable and writes it as E(X). This quantity is described as giving the expected number of workouts in a week.