Table 70.29 displays notation for some of the more common parameters across analyses. The Associated Syntax column shows examples of relevant analysis statement options, where applicable.
Symbol 
Description 
Associated Syntax 

Significance level 
ALPHA= 

Total sample size 
NTOTAL=, NPAIRS= 

Sample size in th group 
NPERGROUP=, GROUPNS= 

Allocation weight for th group (standardized to sum to 1) 
GROUPWEIGHTS= 

(Arithmetic) mean 
MEAN= 

(Arithmetic) mean in th group 
GROUPMEANS=, PAIREDMEANS= 

(Arithmetic) mean difference, or 
MEANDIFF= 

Null mean or mean difference (arithmetic) 
NULL=, NULLDIFF= 

Geometric mean 
MEAN= 

Geometric mean in th group 
GROUPMEANS=, PAIREDMEANS= 

Null mean or mean ratio (geometric) 
NULL=, NULLRATIO= 

Standard deviation (or common standard deviation per group) 
STDDEV= 

Standard deviation in th group 
GROUPSTDDEVS=, PAIREDSTDDEVS= 

Standard deviation of differences 

Coefficient of variation, defined as the ratio of the standard deviation to the (arithmetic) mean 
CV=, PAIREDCVS= 

Correlation 
CORR= 

Treatment and reference (arithmetic) means for equivalence test 
GROUPMEANS=, PAIREDMEANS= 

Treatment and reference geometric means for equivalence test 
GROUPMEANS=, PAIREDMEANS= 

Lower equivalence bound 
LOWER= 

Upper equivalence bound 
UPPER= 

distribution with d.f. and noncentrality 

distribution with numerator d.f. , denominator d.f. , and noncentrality 

th percentile of distribution with d.f. 

th percentile of distribution with numerator d.f. and denominator d.f. 

Binomial distribution with sample size and proportion 
A "lower onesided" test is associated with SIDES=L (or SIDES=1 with the effect smaller than the null value), and an "upper onesided" test is associated with SIDES=U (or SIDES=1 with the effect larger than the null value).
Owen (1965) defines a function, known as Owen’s , that is convenient for representing terms in power formulas for confidence intervals and equivalence tests:
where and are the density and cumulative distribution function of the standard normal distribution, respectively.