October 2015
Beginner
384 pages
16h 41m
English
Content preview from Business Statistics Made Easy in SAS
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Basic Statistics Assessing Variable Spread
Spread Revisited
In Chapter 3 we discussed the concept of variable spread. Apart from statistics like
the mean that represent the centrality of the data in a variable, we also need statistics
that speak to the extent to which the data spreads away from the middle. The following
are some common statistics that measure spread.
Continuous Variable Spread: Standard Deviations & Variances
A standard deviation (SD) is a score that we can use for the spread of data away from an average, although
only in the case of continuous (interval or ratio) data. There is also a related measure
called a variance. Take a look at Figure 7.1 Example of a final descriptive statistics table on page 68 which gives standard ...
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