Formulas and Tables

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For Essentials of Statistics, Second Edition, by Mario F. Triola. Copyright 2005 Pearson Education, Inc. Standard deviation. (frequency table). Central limit ...
Formulas and Tables For Essentials of Statistics, Second Edition, by Mario F. Triola Copyright 2005 Pearson Education, Inc Ch. 6: Confidence Intervals (one population)

Ch. 2: Descriptive Statistics Σx Mean n Σf ⋅x x= Mean (frequency table) Σf

x=

s=

Σ( x − x ) 2 Standard deviation n −1

n ( Σx 2 ) − ( Σx ) 2 s= n ( n − 1)

s=

pˆ − E < p < pˆ + E Proportion

x − E < µ < x + E Mean

where E = zα / 2

Standard deviation (short-cut)

n[Σ (f ⋅ x 2 )] − [Σ( f Standard ⋅ x )]2 deviation deviation Standard n ( n − 1) (frequency table) (frequency table)

Ch. 3: Probability

pˆ qˆ n

where E = za / 2

or E = tα / 2

( n − 1) s 2

χ R2