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stat100 lecture notes and examples...

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We can roughly locate the mean, , of any density curve by eye (the balance point). There is no easy way to locate the standard deviation,, by eye for density curves IN GENERAL. However, we will be studying a very special density curve called the Normal curve. The Normal curve is a density curve where we can locate  by eye. The distribution Normal curves describe are Normal distributions. • The fundamental distribution underlying most of inferential statistics is the normal distribution, which is a continuous distribution. A Normal distribution is described by a Normal density curve. Any particular Normal distribution is completely specified by two numbers: its mean  and standard deviation ....