Casio fx-7400G PLUS Statistical Graphs and Calculations Manuel d'utilisateur télécharger pdf (Page 23)

117

Statistical Graphs and Calculations Chapter 7

4(DRAW)

The following are the meanings of the above parameters.

a ...... Regression coefficient

b ...... Regression constant term

r ...... Correlation coefficient

k Power Regression Graph

Exponential 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 log

y = loga + b × logx . Next, if we say X = log x, Y = logy, and A = loga, the

formula corresponds to linear regression formula Y = A +

bX.

[3(Pwr)

4(DRAW)

The following are the meanings of the above parameters.

a ...... Regression coefficient

b ...... Regression power

r ...... Correlation coefficient

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Casio fx-7400G PLUS Statistical Graphs and Calculations Manuel d'utilisateur Page 23