Computer Intensive Methods

Computer Intensive Methods

Isaacs et al (1983) measured the serum immunoglobulin G (IgG) concentrations of 298 healthy pre-school children aged between 6 months and 6 years who were recruited from the Harrow area of London.
Plot the density of the GGD for different parameter values in order to demonstrate the impact of changing the parameters on the shape and location of the distribution. Draw one plot in which β and k are fixed and θ varies. Another plot in which θ and k are fixed and β varies and a third plot in which θ and β are fixed and k varies. Add a suitable legend to each plot.
Plot a histogram of the IgG measurements. Suggest good starting values for (θ, β, k) that could be used in a maximum likelihood analysis. Explain your reasons for choosing those values. Superimpose the density corresponding to your suggested parameter values on the histogram.

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