A company in Maryland has developed a device that can be attached to car engines,which it believes will increase the miles per gallon that cars will get.The owners are interested in estimating the difference between mean mpg for cars using the device versus those that are not using the device.The following data represent the mpg for random independent samples of cars from each population.The variances are assumed equal and the populations normally distributed. 
Given this data,what is the upper limit for a 95 percent confidence interval estimate for the difference in mean mpg?
Definitions:
Labyrinth
A complex and intricate network of paths or passages, often used metaphorically to describe a complicated situation or problem to be solved.
Incongruity
A state of being out of harmony or lacking agreement between elements.
Privately Owned
Refers to assets, companies, or property owned by an individual or a corporation and not by the government or public.
Women Owned
Pertains to businesses or enterprises that are majority-owned by women.
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