A chi-squared analysis would be performed in this experiment to make which of the following conclusions?
(A) To calculate that there is 1 degree of freedom
(B) To determine if the null hypothesis can be rejected
(C) To determine the standard deviation between two samples
(D) To prove that the working hypothesis is correct

The following study was carried out to examine sexual selection of butterflies. Chemicals believed to be pheromones were isolated from males of certain species of butterfly. An environment was created in which a pheromone-containing droplet was applied to one side of the box and a control drop was applied to the other side. Female butterflies were introduced to the center of the box and given the opportunity to go to either side. The results are shown in the table below.

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# of Butterflies Preferred Side Male chemical side 2,760 Control side 2,240