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Biostatistics Lecture 4

See book examples 351 354 notice the notation reminder

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Unformatted text preview: ous (any value) random variables. See Book Examples 3.5.1 – 3.5.4. Notice the notation . Reminder: we can have theoretical or frequency-based probabilities—see Book Page 86. We can find the mean and variance (and standard deviation) of a random variable, just as we found the mean and variance of a collection of data. Another way to describe the mean of a random variable is expected value . Where is the random variable and are one of the possible values can take, that is, where Possible Probability of outcomes or that outcome/ value of value occurring then ∑ and ∑ Remember that...
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