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29 Cards in this Set
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CI

Confidence interval


d

Cohen’s measure of effect size (standardized mean difference)


df

Degrees of freedom


E

Expected value in a cell of contingency table


Ha or H1

H sub a or H sub one
Alternate hypothesis 

H0

H sub zero
Null hypothesis 

n

Sample size


N

Population size


O

Observed value in a cell of contingency table


p

p value
Probability of a statistic occurring by chance 

r

Sample correlation coefficient


S

Sample standard deviation


S2

s squared
Sample variance 

Sp

s sub p
Pooled standard deviation 

Sx

s sub xbar
Sample standard error of the mean; standard deviation of sampling distribution 

t

t value
t value from Student’s t distribution 

_
x 
Xbar
Sample mean; mean of x values 

Z

Z score
Standard normal deviate 

α
alpha 
Significance level (Type I error)


β
beta 
Beta (Type II error)
or Slope of population regression line 

χ2

chisquare
Test statistic for contingency table 

δ

delta
Mean difference of population observations 

Δ

delta (capital delta)
Change 

μ

mu
Population mean 

σ

sigma
Population standard deviation 

σ2

sigma squared
Population variance 

σ
x 
sigma sub xbar
Standard error of the mean 

Σ

the sum of (capital sigma)
Sum the values that follow 

ρ

rho
Population correlation coefficient 