Level 3 shows the form of the equation. Level 2 shows the sample correlation coefficient, and level 1 shows the covariance of x-y. For definitions of these parameters see Chapter 18 in the User’s Guide.

For additional information on the data-fit feature of the calculator see Chapter 18 in the User’s Guide.

Obtaining additional summary statistics

The application 4.

in the STAT menu can be useful in some

calculations for sample statistics. To get started, press

 

once more,

move to the fourth option using the down-arrow key

, and press

.

The resulting input form contains the following fields:

 

 

 

Σ

 

the matrix containing the data of interest.

 

 

 

 

these options apply only when you have more than two

 

 

columns in the matrix Σ DAT. By default, the x column is

 

 

column 1, and the y column is column 2. If you have only

 

 

one column, then the only setting that makes sense is to have

 

 

 

1.

 

 

 

Σ

Σ

summary statistics that you can choose as

results

of this

 

 

program by checking the appropriate

field

using [

CHK]

 

 

when that field is selected.

‚Ù

 

statistics.

˜

@@@OK@@@

X-Col,Y-Col:

X_1, andY…Y-Col:X-2.Col:

 

￿

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

companion to program

 

As an example, for Summarythe x-y datastatscurrently..

3.Fitdata,..

in Σ DAT, obtain all the summary

To access the summary stats… option, use:

 

 

 

‚Ù˜˜˜Page@@@OK@@@16-6

DAT:Select the column numbers corresponding to the x- and y-

i e., X-Col:

Using the

key select all the options for outputs, i.e.,

Σ X, Σ Y, etc.

 

 

 

 

 

@￿CHK@

 

 

Page 163
Image 163
HP 49g manual Obtaining additional summary statistics, When that field is selected Statistics