02e3a, Linear regression and estimation, Linear regression – HP 10B User Manual
Page 94
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
177 iINPUTi 83 fg»1 3.00
185 lINPUTI 77 (13
4.00
■diS
02E3a
M\cr_x,cry\
iRCOS
184.25
82.75
5.80
4.71
331.00
Enters liciglit and wciglit
of player 3.
Enters height and weight
of player 4..
Calculates mean of
heights (r).
Displays mean of weights
O')-
Calculates population
standard delation for
heights (jtr).
Displays population
standard dc\aation for
weights (y).
Displays the total of the
/s.
Linear Regression and Estimation
L
oooooo
oooooo
CDOOnn
o o o o o
I B S C D O
o o o o c
oooac
Linear regression, is a statistical method for estimation and
forecasting. It is used to find a straight line that best fits a set
cAxy
data. There must be at least two d i f f e r e n t p a i r s . The
straight line provides a relationship between thex- and
>»-variablcs:^ « nu* + b, where m is the slope and b is the
>i-intcrccpt.
Linear Regression.
Calculate m, b, and r (the correlation coefficient),
in three steps.
1.
Enter t h e x j ^ data using the instructions on page
86
.
2. To display b (they-inlcrccpt), press 0
8
Em). Then press ||
to display m (the slope of the line).
3. Press ■dZ) I(
1
W
a
0
to display r, the correlation coefficient.
7: SUtifttical Catculationt 91