khatereh Posted June 23, 2012 Share Posted June 23, 2012 I have some data with defined standard error. I should calculate the ln() of each data. do you know what would be the error of new data? Link to comment Share on other sites More sharing options...
studiot Posted June 23, 2012 Share Posted June 23, 2012 If y = ln(x) What is dy/dx What therefore is delta_y in terms of delta_x Can you relate delta_y and delta_x to standard errors? Link to comment Share on other sites More sharing options...
Bioc Posted June 24, 2012 Share Posted June 24, 2012 hum, as far as I know this kind of transformation is to obtain a linear graph, so dy/dx should be the slope. No idea what would happen to the error, tough. Link to comment Share on other sites More sharing options...
khatereh Posted June 24, 2012 Author Share Posted June 24, 2012 If y = ln(x) What is dy/dx What therefore is delta_y in terms of delta_x Can you relate delta_y and delta_x to standard errors? sorry, I can not follow it. should i use the derivative of the function to calculate the error for each data? Link to comment Share on other sites More sharing options...
Robert Oppenheimer Posted June 27, 2012 Share Posted June 27, 2012 Am I the only one who finds the question very ambiguous? Could you perhaps quote the exact question? Link to comment Share on other sites More sharing options...
khatereh Posted July 5, 2012 Author Share Posted July 5, 2012 Am I the only one who finds the question very ambiguous? Could you perhaps quote the exact question? I want to find the error for each lnk. Link to comment Share on other sites More sharing options...
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