Statistical Methods.- Uniform and Correlated Mass Density Fields.- The Power Spectrum and the Classification of Stationary Stochastic Fields.- Fractals.- Multifractals and Mass Distributions.- Applications to Cosmology.- Fluctuations in Standard Cosmological Models: A Real Space View.- Discrete Representation of Fluctuations in Cosmological Models.- Galaxy Surveys: An Introduction to Their Analysis.- Characterizing the Observed Distribution of Visible...