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  1. S

    'e' in expected values in Poisson

    Using this example (see below) could someone please tell me what the 'e' symbol stands for and how one would work out the expected values manually. 'log(λi) = 1.65 + 0.43 × xi where xi = 1 for a female, and xi = 0 for a male. Poisson Regression Using this example, we see that for a...
  2. S

    Prediction and Poisson

    I have been set the tast of running a Poisson regression and then using the predict command to predict the number of visits to the doctors per age group (<30, 30-50, >50) Whilst keeping illness and sex at their constant mean values. Now my gender variable is: > levels(DoctorVisits$gender)...