Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 580)

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The general form of the regression equation is η = A + Bξ.

Best data fitting

The calculator can determine which one of its linear or linearized relationship

offers the best fitting for a set of (x,y) data points. We will illustrate the use of

this feature with an example. Suppose you want to find which one of the data

fitting functions provides the best fit for the following data:

First, enter the data as a matrix, either by using the Matrix Writer and entering

the data, or by entering two lists of data corresponding to x and y and using

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:

3: '3.99504833324*EXP(-.579206831203*X)'

2: Correlation: -0.996624999526

1: 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 0.2 0.5 1 1.5 2 4 5 10

y 3.162.732.121.651.290.470.290.01

1 2 ... 575 576 577 578 579 580 581 582 583 584 585 ... 886 887

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