Perform the indicated operation and simplify. 
Definitions:
F-ratio
A statistic used in ANOVA tests to compare the variances between groups, determining if the means of several groups are equal.
Residual
In statistical modeling, the difference between observed values and the values predicted by a model.
Regression Analysis
A statistical method used to examine the relationship between one dependent variable and one or more independent variables.
Residual Standard Deviation
A measure of the amount by which the actual values differ from those predicted by a regression model.
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