On Apr 22, 2011, at 6:30 PM, Shatha Omar wrote:

Dear,

i am a student and I need help in comparing between different slopes and
finding whther there is a significant difference between them?

slope1/slope2 > 1

If TRUE then slope1 is greater.

OK. That was facetious. But I hope it highlights what's missing from your question:

 .... An example in R code.

--
David Winsemius, MD
West Hartford, CT

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