FormulaSheets-X1

FormulaSheets-X1 - BUS-271 FORMULA SHEETS (X1) Sven...

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1 BUS-271 FORMULA SHEETS (X1) © Sven Thommesen 2011 [Updated 05/19/2009] CHAPTER 3 FORMULAS STATISTICAL CONCEPT Formula for a SAMPLE Formula for a POPULATION MEAN x 1 n i i X n x 1 N i i X N x VARIANCE of x 2 2 1 () 1 n i i X xX s n 2 2 1 N iX i X x N STANDARD DEVIATION for x 2 xx ss 2  COEFFICIENT OF VARIATION for x . . 100 s cv X  . . 100 Z-SCORES from x
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