66
67
* Erroneous data clearing/correction ( correct data
operation: 10 1003 )
If 11 1003 is entered, enter correct data after
pressing .
If 11 1003 is entered, enter correct data
after pressing .
If 11 1003 was entered previously, enter
correct data after pressing 11 1003 .
Logarithmic regression
• The regression formula is y = A + B•Inx. Enter the x data
as the logarithm (In) of x, and the y data inputs the same
as that for linear regression.
• Estimated values ,and based on the regression
formula can be calculated using the following formulas:
• The same operation as with linear regression can be used
to obtain the regression coefficient and for making
corrections. To obtain the estimated value , x
, Is used, and to obtain estimated value , y
, is used.
Furthermore, ∑x, ∑x
2
and ∑xy are obtained by ∑Inx, ∑
(Inx)
2
, and ∑lnx•y respectively.
Linear regression
To Next Page
Loading...
