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For Exercise 1, use the estimator based on overall intersection probabilities
Exercise 1
An adaptive cluster sample initially selects a random sample of n = 4 strips from the N = 25 in the study region. Each strip contains M = 12 secondary units. Neighborhoods are defined to include adjacent secondary units as in the example in the text. The first sample unit intersects a network that intersects m1 = 3 strips in the population and has y1 = 50 animals. Another network, with y2 = 30 animals, intersects both the first and second sample strips, and intersects m2 = 5 strips altogether; m12 = 2 strips in the population intersect both these networks. No other animals are observed. Estimate the number of animals in the study area using draw-by-draw initial probabilities. Estimate the variance of the estimator.
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at time 0 a box contains one pen and one pencil. at each time n after a item is chosen at random from the box and put
Each of the 6815 subjects above is considered as belonging to one of the three groups defined by the number of cups of coffee consumed per day (the three columns). Calculate for each of the three groups the proportion of subjects admitted because ..
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