Two independent random samples of annual starting salaries for individuals with masters and bachelors degrees in business were taken and the results are shown below 
a.What are the degrees of freedom for the t distribution?
b.Provide a 95% confidence interval estimate for the difference between the salaries of the two groups.
Definitions:
Job Order Costing
An accounting method used to track costs and evaluate the profitability of individual jobs, suitable for companies that produce custom products or jobs.
Large Aircraft Manufacturers
Companies that specialize in the development, assembly, and selling of aircrafts that have a high passenger or cargo capacity.
Process Costing
An accounting methodology applied where production is continuous, assigning costs to units of product on the basis of process they go through.
Customized Products
Items or services tailored to meet the specific needs or preferences of individual customers.
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