HP 32SII Owner's Manual page 273

M
R
X
Y
i
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
Y 104.5
Keys:
S
40.5
104.5
38.6
102
Now intentionally enter 379 instead of 37.9 so that you can see how to
correct incorrect entries.
Keys:
379
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24
also used for scratch.
Regression coefficient (slope of a straight line).
Correlation coefficient; also used for scratch.
The x–value of a data pair when entering data; the
hypothetical x when projecting
(x–estimate) when given a hypothetical y.
The y–value of a data pair when entering data; the
hypothetical y when projecting
(y–estimate) when given a hypothetical x.
Index variable used to indirectly address the correct
y ˆ
x ˆ
–, –projection equation.
38.6 37.9
102 1.00
Display:
value
Display:
Size : 17 .7 x 25.2 cm
y ˆ
; or
x ˆ
; or
36.2 35.1
97.5 95.5
Description:
Starts straight–line routine.
Enters x–value of data pair.
Enters y–value of data pair.
Enters x–value of data pair.
Enters y–value of data pair.
Description:
Enters wrong x–value of data pair.
Statistics Programs 16–9
x ˆ
y ˆ
34.6
94