HP 49g+ - Manual (Page 580)

Page 18-13
the program CRMC developed in Chapter 10. Next, save this matrix into the
statistical matrix
ΣDAT, by using function STOΣ.
Finally, launch the data fit application by using:
‚Ù˜˜@@@OK@@@ . The
display shows the current ΣDAT, already loaded. Change your set up screen
to the following parameters if needed:
Press @@@OK@@@, to get:
1: '3.99504833324*EXP(-.579206831203*X)'
2: Correlation: -0.996624999526
3: Covariance: -6.23350666124
The best fit for the data is, therefore, y = 3.995 e
-0.58 ⋅ x .
Obtaining additional summary statistics
The application 4.
Summary stats.. in the STAT menu can be useful in some
calculations for sample statistics. To get started, press ‚Ù once more,
move to the fourth option using the down-arrow key ˜, and press @@@OK@@@.
The resulting input form contains the following fields:
ΣDAT: the matrix containing the data of interest.
X-Col, Y-Col:
these options apply only when you have more than two
columns in the matrix ΣDAT. By default, the x column is
column 1, and the y column is column 2.
_ΣX _ ΣY…
: summary statistics that you can choose as results of this
program by checking the appropriate field using [ CHK]
when that field is selected.
Many of these summary statistics are used to calculate statistics of two
variables (x,y) that may be related by a function y = f(x). Therefore, this
program can be thought off as a companion to program
3. Fit data..
Example 1 – For the x-y data currently in
ΣDAT, obtain all the summary
statistics.