In the full lesson
- Requirements (text)
- Cumulative Distribution Function (text)
- Discrete Example (example)
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Module 3 · Distributions · Topic 3
Probability Distributions
What Is a Probability Distribution?. A probability distribution describes all possible values of a random variable and their associated probabilities. It completely specifies the behavior of the random variable.
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Key formulas
From the Distributions formula sheet
- Binomial PMF:
P(X = k) = C(n,k)p^k(1-p)^(n-k)- Exact probability of k successes in n independent Bernoulli trials. - Z-Score:
z = (x - mu) / sigma- Standardizes a value by measuring standard deviations from the mean.
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