98
Statistics 2Var app
Calculating predicted values
The functions
PREDX
and
PREDY
estimate (predict) values
for
X
or
Y
given a hypothetical value for the other. The
estimation is made based on the equation that has been
calculated to fit the data according to the specified fit.
Find predicted
values
1. In the Plot view, draw the regression curve for the
data set.
2. Press
\
to move to the regression curve.
3. Press
and enter the value of
X
. The cursor
jumps to the specified point on the curve and the
coordinate display shows
X
and the predicted value
of
Y
.
In the Home view:
•
Enter
PREDX
(
y-value
)
E
to find the predicted value
for the independent variable given a hypothetical
dependent value.
•
Enter PREDY(
x-value
) to find the predicted value of the
dependent variable given a hypothetical independent
variable.
You can type
PREDX
and
PREDY
into the edit line, or you
can copy these function names from the Commands menu
under the
Apps
,
Statistics 2Var
category.
H I N T
In cases where more than one fit curve is displayed, the
PREDX
and
PREDY
functions use the first active fit defined
in the Symbolic view.
Summary of Contents for 39gII
Page 1: ...HP 39gII graphing calculator user s guide Edition1 Part Number NW249 90001 ...
Page 2: ...Printing History Edition 1 November 201 1 ...
Page 32: ...22 Getting started ...
Page 58: ...48 Apps and their views ...
Page 70: ...60 Function app ...
Page 80: ...70 Solve app ...
Page 136: ...126 Polar app ...
Page 140: ...130 Sequence app ...
Page 148: ...138 Finance app ...
Page 152: ...142 Linear Solver app ...
Page 218: ...208 Matrices ...
Page 226: ...216 Notes and Info ...
Page 238: ...228 Variables and memory management ...
Page 318: ...308 Programming ...
Page 340: ...330 Reference information ...
Page 346: ...vi Product Regulatory Information ...