PROC TTEST: Common Notation :: SAS/STAT(R) 9.2 User's Guide, Second Edition

The TTEST Procedure

Table 92.4 displays notation for some of the commonly used symbols.

Table 92.4 Common Notation
Symbol	Description
$\text{[math]}$	population value of (arithmetic) mean
$\text{[math]}$	null value of test (value of H0= option in PROC TTEST statement)
$\text{[math]}$	population variance
$\text{[math]}$	population value of standard deviation
$\text{[math]}$	population value of geometric mean
$\text{[math]}$	population value of coefficient of variation (ratio of population standard deviation and population arithmetic mean)
$\text{[math]}$	value of ALPHA= option in PROC TTEST statement
$\text{[math]}$	$\text{[math]}$ th percentile of $\text{[math]}$ distribution with $\text{[math]}$ degrees of freedom (d.f.)
$\text{[math]}$	$\text{[math]}$ th percentile of $\text{[math]}$ distribution with $\text{[math]}$ numerator d.f. and $\text{[math]}$ denominator d.f.
$\text{[math]}$	$\text{[math]}$ th percentile of chi-square distribution with $\text{[math]}$ d.f.