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 value of the test statistic?
Definitions:
Neurotransmitter
Chemicals that transmit signals across a synapse from one neuron to another, influencing bodily functions such as mood, appetite, and sleep.
Exocytosis
The process by which cells release substances (such as neurotransmitters or hormones) to the exterior through fusion of vesicles with the plasma membrane.
Endocytosis
A cellular process in which substances are brought into the cell by engulfing them in an energy-using process.
Parallel After-discharge Circuit
A circuit configuration in neural networks that involves parallel paths with different lengths that can cause prolonged signal discharge.
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