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Training in statistics at university should be informed at least in part by what graduates will have to do with acquired statistical knowledge after graduation. A sample of 977 employed graduates with PhD and Masters degrees in seven specialties with statistics prerequisites at university identifies which of 46 statistics based techniques (the items) they… (More)

Nearly every well installation process nowadays relies on some sort of risk assessment study, given the high costs involved. Those studies focus mostly on estimating the total time required by the well drilling and completion operations, as a way to predict the final costs. Among the different techniques employed, the Monte Carlo simulation currently stands… (More)

Brief review about Item Response Theory. Two parameter IRT model for dichotomous responses. Latent traits. Skew normal distribution for the latent traits. Psychometric theory: a set of models which deals with latent variables (called latent traits). Item Response Models (IRM) : represent the probability of a examinee get a certain score in an item. Such… (More)

The objective of this study is to evaluate students' learning from the contents presented in class. Data from undergraduate students were collected in three consecutive years since 2005 and from five different careers in the area of Mathematics. For a sample of these students, who successful completed the two basic classes in statistics, a test was applied… (More)

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