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Discrete Variables vs. Continuous Variables

Chapters 6, 7, 8, and 9 are all “probability” chapters.

  • Each chapter teaches you a different method for determining the probability of a particular outcome, or set of outcomes occuring.
  • Each chapter focuses on a different combination of data type, and on a different number of outcomes:

Random variable: A function or rule that assigns a number to each outcome of an experiment

Discrete random variable: Values are countable, e.g. the number of courses, number of siblings, age (in years)

Continuous random variable: Values are uncountable – typically measured quantities, e.g. height, weight, time, speed


Test your understanding: