Texas Instruments BA II Plus - Page 95

6: Statistics Worksheet 89
Notes about the Statistics Worksheet
& j & z
sets all
X
and
Y
values and all values in
the Stat portion of the worksheet to zero, but does not affect
the statistics calculation method.
& k & z
sets the statistics calculation method to
LIN
and all values to zero.
& } !
sets the statistics calculation method to
LIN
and
X
,
Y
, and all other values to zero.
You can enter up to 50 (
x,y
) data points.
If you have not entered any data points, an error will occur
when you press
#
or
"
to move through the portion of the
worksheet that displays results.
When you are entering data for one-variable statistics,
X
nn
represents the value and
Y
nn
specifies the number of
occurrences (frequency). When you enter a value for
X
nn
, the
value for
Y
nn
defaults to 1.
To analyze one-variable statistics, select
1-V
. Only values for
n
,
x
,
Sx
,
s
X
,
G
X
, and
G
X
2
are computed and displayed for one-
variable statistics.
When analyzing two-variable statistics, you have four
regression methods to choose from:
•
LIN
— Standard linear regression analysis
•
Ln
— Logarithmic regression analysis
•
EXP
— Exponential regression analysis
•
PWR
— Power regression analysis
Except for
X'
and
Y'
, the values for the statistics variables are
automatically computed and displayed when you access them.
You can use the
X'
and
Y'
variables for regression predictions.
You can enter a value for
X'
to compute
Y'
, or enter a value for
Y'
to compute
X'
.