HP 50g Graphing Calculator - Manual (Page 584)

Page 18-17
ΣPAR: shows statistical parameters.
RESET: reset parameters to default values
INFO: shows statistical parameters
The MODL sub-menu within
ΣPAR
This sub-menu contains functions that let you change the data-fitting model to
LINFIT, LOGFIT, EXPFIT, PWRFIT or BESTFIT by pressing the appropriate button.
The 1VAR sub menu
The 1VAR sub menu contains functions that are used to calculate statistics of
columns in the
ΣDATA matrix.
The functions available are the following:
TOT: show sum of each column in ΣDATA matrix.
MEAN: shows average of each column in ΣDATA matrix.
SDEV: shows standard deviation of each column in ΣDATA matrix.
MAX Σ: shows maximum value of each column in ΣDATA matrix.
MIN Σ: shows average of each column in ΣDATA matrix.
BINS: used as x
s
, Δx, n [BINS], provides frequency distribution for data in
Xcol column in ΣDATA matrix with the frequency bins defined as
[x
s
,x
s
+ Δx], [x
s
,x
s
+2 Δx],…, [x
s
,x
s
+n Δx].
VAR: shows variance of each column in ΣDATA matrix.
PSDEV: shows population standard deviation (based on n rather than on (n-1))
of each column in
ΣDATA matrix.
PVAR: shows population variance of each column in ΣDATA matrix.
MIN Σ: shows average of each column in ΣDATA matrix.
The PLOT sub-menu
The PLOT sub-menu contains functions that are used to produce plots with the
data in the
ΣDATA matrix.