Direct drivers of deforestation in Amazon countries Cattle ranching Cattle ranching is the leading cause of deforestation in the Amazon rainforest. In Brazil, this has been the case since at least the 1970s: government figures attributed 38 percent of deforestation from 1966-1975 to large-scale cattle ranching.
The sampling frequency or sampling rate, fs, is the average number of samples obtained in one second (samples per second), thus fs = 1/T. Reconstructing a continuous function from samples is done by interpolation algorithms.
1 Assume that your population is 75% female and 25% male. 2  Assume also that you want a sample of size 100 and you want to stratify on the variable called gender. 3  For proportional stratified sampling, you would randomly select 75 females and 25 males from the population.