The least stable conformation of 3-bromo-2-methylpentane,viewed through the C-2-C-3 bond (i.e. ,C-2 in the front,C-3 in the back) : 
Definitions:
F-ratio
A statistical measure used in analysis of variance (ANOVA) to determine the degree of variation between sample means in comparison to variation within the samples.
Critical Value
A point on the test distribution that is compared to the test statistic to decide whether to reject the null hypothesis.
Degrees of Freedom
Refers to the number of independent values or quantities which can be assigned to a statistical distribution or a statistical test.
DfBG
Degree of Freedom Between Groups, a statistical parameter used in ANOVA to determine the variability among group means.
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