Texas Instruments TI-83 PLUS - Manual (Page 317)

TI-83 Plus Lists 314
To evaluate G 2 (N–1) from N=1 to 4:
stdDev(, variance(
stdDev( returns the standard deviation of the elements in list . The default
value for freqlist is 1. Each freqlist element counts the number of
consecutive occurrences of the corresponding element in list . Complex lists
are not valid.
variance( returns the variance of the elements in list . The default value for
freqlist is 1. Each freqlist element counts the number of consecutive
occurrences of the corresponding element in list . Complex lists are not
valid.
stdDev( list [ , freqlist ] ) variance( list [ , freqlist ] )