Casio ALGEBRA FX 2.0 Statistical Graphs and Calculations Instrukcja Użytkownika Pobierz pdf (Strona 18)

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k Power Regression Graph

Power regression expresses y as a proportion of the power of x. The standard power

regression formula is y = a × x

, so if we take the logarithms of both sides we get In y = In a +

b × In x. Next, if we say X = In x, Y = In y, and a = In a, the formula corresponds to linear

regression formula Y = a + bX.

4(CALC)j(Power)

6(DRAW)

The following is the power regression model formula.

y = a

•

a ............. regression coefficient

b ............. regression power

r .............. correlation coefficient

............. coefficient of determination

k Sinusoidal Regression Graph

Sinusoidal regression is best applied for cyclical data.

The following is the sinusoidal regression model formula.

y = a·sin(bx + c) + d

While the statistical data list is on the display, perform the following key operation.

4(CALC)v(Sin)

6(DRAW)

Drawing a sinusoidal regression graph causes the angle unit setting of the calculator to

automatically change to Rad (radians). The angle unit does not change when you perform a

sinusoidal regression calculation without drawing a graph.

• Certain types of data may take a long time to calculate. This does not indicate malfunction.

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Calculating and Graphing Paired-Variable Statistical Data

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Casio ALGEBRA FX 2.0 Statistical Graphs and Calculations Instrukcja Użytkownika Strona 18