A continuous distrubution is a probability dustribution where the underlying value is continuous, for example a height or period of time. Usually there is zero probability of being any particlar value, instead it is a probability density', that is a value of 0..3 at 1.7 metres, is interpreted to mean that in a small area around 1.7 (say 1.6 to 1.8), the probability of being in the range is 0.3 times the width of the range (0.2) that is 0.06.
Used in Chap. 7: page 95
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