be intrinsically discontinuous because it is the count of some number of discrete objects, such as eye facets or bristles. It is sometimes convenient, however, to develop concepts by using this slightly idealized curve as short-hand for the more cumbersome observed frequency histogram. Statistical measures Although a statistical distribution contains all of the in-formation that we need about a set of measurements, it is often useful to distill this information into a few char-acteristic numbers that convey the necessary informa-tion about the distribution without giving it in detail. There are several questions about the height distribution for male undergraduates, for example, that we might like to answer: 1. Where is the distribution located along the range of possible values? Are our observed values of height, for example, closer to 100 or to 200 cm? This question can be answered with a measure of central tendency. 2.
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This note was uploaded on 01/10/2011 for the course BIOL BIOL taught by Professor Johnson during the Spring '08 term at Aberystwyth University.