HP 32SII User Manual
Page 273
Statistics
Programs
16–9
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
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.
Example 1:
Fit a straight line to the data below. Make an intentional error when keying in
the third data pair and correct it with the undo routine. Also, estimate y for an
x value of 37. Estimate x for a y value of 101.
X 40.5
38.6
37.9
36.2 35.1 34.6
Y 104.5
102
1.00
97.5 95.5 94
Keys: Display:
Description:
W
S
%@)
Starts straight–line routine.
40.5
f
&@
value
Enters x–value of data pair.
104.5
f
%@)
Enters y–value of data pair.
38.6
f
&@ )
Enters x–value of data pair.
102
f
%@)
Enters y–value of data pair.
Now intentionally enter 379 instead of 37.9 so that you can see how to
correct incorrect entries.
Keys: Display:
Description:
379
f
&@ )
Enters wrong x–value of data pair.