Formula Sheet 1

Formula Sheet 1 - Formula Sheet #1 Week of 1/21/08 I. Mean...

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Formula Sheet #1 Week of 1/21/08 Page 1 of 1 I. Central Tendency & Variability Mean () / / i i X N M XN µ = = Variance: 22 / / 1 sX M N σµ =− Variance (computational formula) = 2 2 (( ) / ) (( ) / ) 1 X N X s N σ = = ∑∑ Standard Deviation: 2 2 ss = = II. Standard Normal Distribution (
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