Which of the following is a gauche conformation for butane? 
Definitions:
Population Locations
Typically refers to the geographical distribution of individuals or entities within a given area, used in studies like demography and ecology.
Independent Samples
Samples that are collected without any of the members affecting the other, ensuring that the samples do not influence each other.
Wilcoxon Rank Sum Test
A non-parametric statistical test used to compare two independent samples to determine if they come from the same distribution.
Two Populations
Describes two distinct groups or sets of items or individuals for which certain studies or analyses are conducted.
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