HP 10BII Owner's Manual page 90

Keys: Display:
[m6] 184.25
ватт 82.75
[mcm
5,80
Om 471
eu
331.00
Description:
Clears statistical registers.
Enters height and weight of
player 1.
Enters height and weight of
player 2.
Enters height and weight of
player 3.
Enters height and weight of
player 4.
Calculates mean of heights (x).
Displays mean of weights ()).
Calculates population standard
deviation for heights (x).
Displays population standard
deviation for weights (у).
Displays thc total of ће y's.
Linear Regression and Estimation
the y-intercept.
Linear regression is a statistical method for estimation and
forecasting, It is used to find a straight line that best fits a
set of xy data. There must be at least two different xy
pairs. The straight line provides a relationship between the
x- and y-variables: y = mx + b, where m is the slope and bis
Linear Regression. Calculate э, b, and r (the correlation coefficient) as
follows:
1. Clear the statistical registers by pressing БӘСІ).
2. Enter the first x-value and press 68). The x-value is displayed.
3. Enter the corresponding y-value and press Œ). The НР 10BII
displays л, the number of pairs of items accumulated.
4. Continue entering x,y pairs. The #-value is incremented with each
entry.
5. To display P (the y-intercept), press OQA. Then press
to display » (the slope of the line).
6. Press ENE to display 7, the correlation coefficient.
90 7: Statistical Calculations