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DesDef - W.R Wilcox Clarkson University November 2006...

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W.R. Wilcox , Clarkson University, November 2006 Definitions of descriptive statistics of a single variable generated by the tool Descriptive Statistics tool in Excel’s Data Analysis Background Imagine that we want to know the distance from the front wall of this room to its back wall. We measure it. We measure it again and obtain a slightly different result. We might guess that the average of these two measurements would be closer to the true (unknown) value, and that the more measurements we make the closer the average will be to the true value. In principle, the number of possible measurements is unlimited. We might also measure the diameter of pistons being produced in an automotive plant. Each of these will be somewhat different, reflecting not only errors in our method of measuring but also real variations in the actual diameter. Again, in principle, there is no limit to the number of pistons that could be produced and measured.
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