Sentry Industries CA756 - Manual (Page 50)

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* 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