Discussion (WK6)
Question 1:
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain.
ANOVA Means Analysis of Variance. It is used to analyze total variability of a set of data. It segregates the variability
into different components. This helps the researcher to determine the source of such variability by recognizing the
reason for the variation. Hence, it is a very important measure of variability for a researcher.
There are two models to ANOVA
–
Fixed Effect Model and the Random Effect Model. The Fixed Effect Model is used
when the researcher wants to determine the range of values that the dependent variable can take and how it can be
applied to population. The Random effect Model is used when the data are drawn from different populations. The
values derived in this case will themselves be random variables. Not much inference can be made using these.
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 Fall '10
 RandallBarcus
 Statistics, Regression Analysis, R Square, random effect model

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