Casio fx-7400G PLUS Statistical Graphs and Calculations Manual do Utilizador descarregar pdf (Página 21)

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Statistical Graphs and Calculations Chapter 7

k Med-Med Graph

When it is suspected that there are a number of extreme values, a Med-Med graph

can be used in place of the least squares method. This is also a type of linear regres-

sion, but it minimizes the effects of extreme values. It is especially useful in produc-

ing highly reliable linear regression from data that includes irregular fluctuations,

such as seasonal surveys.

2(Med)

4(DRAW)

The following are the meanings of the above parameters.

a ...... Med-Med graph slope

b ...... Med-Med graph y-intercept

k Quadratic Regression Graph

A quadratic regression graph represents connection of the data points of a scatter

diagram. It actually is a scattering of so many points that are close enough together

to be connected. The formula that represents this is quadratic regression.

3(X^2)

4(DRAW)

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