To compare the effect of weather on sales of soft drinks, a distributor surveyed people in two regions of the country and asked if they purchased soft drinks in the last month. The following are the results. The distributor would like to know if there is a difference in sales between the two regions. 
What is the pooled estimate of the population proportion?
Definitions:
Gang Norm
The shared expectations and rules that govern the behavior of members within a gang or similar group.
Just World
The belief that the world is fundamentally fair and individuals get what they deserve.
Group Polarisation
The tendency for a group to make decisions that are more extreme than the initial inclination of its members.
Intergroup Attribution
Process of assigning the cause of one’s own or others’ behaviour to group membership.
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