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Analysis of variance

Function In-house Outsource
Art Direction 100,000.00 500,000.00
Graphic Design 350,000.00 500,000.00
Print Buy/Design & Production 100,000.00 250,000.00
Production 350,000.00 500,000.00
Digital Media 100,000.00 250,000.00
Video Production 100,000.00 350,000.00
Web design 350,000.00 550,000.00
Project Management 500,000.00 1,000,000.00
Digital Asset Management 100,000.00 500,000.00
Total 2,050,000.00 4,400,000.00

My ideas:

T2 = ? [(x-u)2 P(x)]
P(x) = x * probability occurrence (see example)
U = ? x(Px) - see example continued on P.186

The Px summation equals one and my thinking was that x is the particular values that we have that would be grouped into the categories 100k, 350k, and >350k.

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