Unformatted text preview: True and Sample Populations True Population vs. Sample Population o Statistical features of true population may not be known o Sample estimates featuers of true populatin Impractical to measure every individual o Time and resource constraints Why a random sample? o Random sample is unbiased estimator of population features What is random o Random doesn’t always look random o Haphazardness is not random o Random number generators Types of Data Discrete vs. Continuous Data Discrete categories, no ‘in betweens’ (e.g., high, medium, low) Continuous – along a continuum, always ‘inbetweens’ (e.g, time, length, mass)...
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- Fall '08
- Biology, Randomness, random number generators, BS 158H Notes, True Population vs