Stat notes 19 PDF

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stat100 lecture notes and examples...

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A Density Curve (Review)  Always on or above the horizontal axis  Has an area exactly 1 underneath curve  Area under the curve and above any range of values is the proportion (also known as the area or probability) of all observations that fall in that range  The density curve describes the overall pattern of a distribution  No set of real data is exactly described by a density curve. The curve is an idealized description that is easy to use and accurate enough for practical use. An interpretation of the probability density function is:  The random variable is more likely to be in those regions where the function is higher.  The random variable is less likely to be in those regions where the function is lower.  The random variable is never in those regions where the function is zero....