Measuring Measuring Errors
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چکیده
An important part of statistical analysis, perhaps the most important part, is the identification and quantification of sources of variation. For example, in a t-test the variation between groups is compared with variation within the groups to see if the former can be explained by the latter alone. The main tool for measuring variation is the standard deviation (SD), although it is sometimes useful to consider the variance, which is simply the square of the SD.
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