x1 09 Experimental Design
9
Statistics
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Any value that is calculated from a set of observations is a statistic. A statistic conveys information about the observed values without giving all the observations.
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Prevalence and Incidence (introduced in lecture 8) are statistics of a disease in a population.
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Mean and median are statistics that measure ‘central tendency’ -where middle is.
Speaker Notes:
9
What statistic measures dispersion?