Chapter 8 The Poisson Distribution

Example 8.1 Two data sets on radiation from a radioactive source. Example 8.2 Counts of nematodes. Example 8.3 Classification of water fleas according to depth and time of day. Exercise 8.1 Theoretical exercise. No data. Exercise 8.2 The data from Rutherford and Gieger are concerned with the number of scintillations caused by radioactive decay of a quantity of the element polonium in a number of time intervals of the same length. Exercise 8.3 The data are from an investigation on transport of sand by the wind. The exercise is concerned with the distribution of the number of sand grains passing a control volume and its dependence on the wind speed and of the position of the control volume over the surface of the sand. Exercise 8.4 Occurrence of great titmouse (Parus major) at three different localities of different area. Exercise 8.5 The data in this exercise are concerned with "serious"' earthquakes in a period of 75 years, from 1903 through 1977. Exercise 8.6 Number of bacteria colonies in small quadratic regions of the same area in the central part of a Petri dish. Exercise 8.7 The data are from an investigation of the common tern (S. fluviatilis) and consist of a classification of a number of terns according to the surroundings and the quality of the nest. Exercise 8.8 Occurrence of spores of the fungus Penicillium sp. in homes of allergic children living at three different locations. The spores deposited in Petri dishes were grown and the number of colonies was counted. The counts were made on a particular day every month during a year. The data are analyzed using the multiplicative Poisson model. It is examined if the number of colonies vary according to the season and with the location. Exercise 8.9 Fine-gravel particles classified according to composition and position on a profile. Exercise 8.10 32 cases of Creutzfeldt-Jakob disease classified according to age and year of diagnostic.