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Probability Distributions

Probability Distributions. Random Variable. A random variable x takes on a defined set of values with different probabilities. For example, if you roll a die, the outcome is random (not fixed) and there are 6 possible outcomes, each of which occur with probability one-sixth.

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1.88k views • 86 slides

Biostatistics-Lecture 3 Estimation , confidence interval and hypothesis testing

Biostatistics-Lecture 3 Estimation , confidence interval and hypothesis testing. Ruibin Xi Peking University School of Mathematical Sciences. Some Results in Probability (1). Suppose that X, Y are independent ( ) E( cX ) = ? (c is a constant) E(X+Y) = ? Var ( cX ) = ?

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559 views • 38 slides

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E cx - PowerPoint PPT Presentation

Probability Distributions

Biostatistics-Lecture 3 Estimation , confidence interval and hypothesis testing