A national manufacturer of ball bearings is experimenting with two different processes for producing precision ball bearings. It is important that the diameters be as close as possible to an industry standard. The output from each process is sampled and the average error from the industry standard is calculated. The results are presented below. 
The researcher is interested in determining whether there is evidence that the two processes yield different average errors.
There are how many degrees of freedom?
Definitions:
Business Combination
The process of bringing two or more separate companies together under common control or ownership.
Negative Goodwill
Occurs when the purchase price of a company is less than the fair value of its net assets, often reflecting a bargain purchase.
Acquisition Method
An accounting approach used to consolidate the financial statements of two companies when one acquires control over the other.
Unrealized Gain
An increase in the value of an asset that has not been sold, reflecting a potential profit that is not yet realized.
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