Discussion 500 words | Business & Finance homework help

In Chapter 3 ppt attached below, the t-stat is discussed. Please explain the t-stat in your own words and give an example of its practical usage. Please cite examples according to APA standards.

Post should be at least 450+ words and in APA format (including Times New Roman with font size 12 and double spaced) 

I attached the Chapter 3 PPT