HP 33s User Manual
Page 268
16–8
Statistics
Programs
5.
Repeat steps 3 and 4 for each data pair. If you discover that you have made
an error after you have pressed
g
in step 3 (with the &@value prompt still
visible), press
g
again (displaying the %@value prompt) and press
X
U
to undo (remove) the last data pair. If you discover that you made an error after
step 4, press
X
U. In either case, continue at step 3.
6.
After all data are keyed in, press
X
R to see the correlation coefficient, R.
7.
Press
g
to see the regression coefficient B.
8.
Press
g
to see the regression coefficient M.
9.
Press
g
to see the %@value prompt for the
xˆ
,
yˆ
–estimation routine.
10.
If you wish to estimate
yˆ
based on x, key in x at the %@value prompt, then
press
g
to see
yˆ
(&@).
11.
If you wish to estimate
xˆ
based on y, press
g
until you see the &@value
prompt, key in y, then press
g
to see
xˆ
(%@).
12.
For more estimations, go to step 10 or 11.
13.
For a new case, go to step 2.
Variables Used:
B
Regression coefficient (y–intercept of a straight line); also
used for scratch.
M
Regression coefficient (slope of a straight line).
R
Correlation coefficient; also used for scratch.
X
The x–value of a data pair when entering data; the
hypothetical x when projecting
yˆ
; or
xˆ
(x–estimate)
when given a hypothetical y.
Y
The y–value of a data pair when entering data; the
hypothetical y when projecting
xˆ
; or
yˆ
(y–estimate)
when given a hypothetical x.
i
Index variable used to indirectly address the correct
xˆ
–,
yˆ
–projection equation.
Statistics registers
Statistical accumulation and computation.