In order to estimate the difference between the average Miles per Gallon of two different models of automobiles, samples are taken and the following information is collected. 
a.At 95% confidence develop an interval estimate for the difference between the average Miles per Gallon for the two models.
b.Is there conclusive evidence to indicate that one model gets a higher MPG than the other? Why or why not? Explain.
Definitions:
Economic Downturn
A period of negative growth in an economy, characterized by a decrease in the GDP, employment, and spending.
Inflation
The frequency at which the average pricing for goods and services uplifts, subsequently reducing the power of procurement.
Opportunity Cost
The value of the best alternative forgone, where a choice needs to be made between several mutually exclusive alternatives under conditions of scarcity.
Invisible Hand
A term coined by Adam Smith to describe the self-regulating nature of the marketplace, where individuals' pursuit of self-interest leads to beneficial social outcomes.
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