inference

Correcting inferences for volunteer-collected data with geospatial sampling bias

Citizen science projects in which volunteers collect data are increasingly popular due to their ability to engage the public with scientific questions. The scientific value of these data are however hampered by several biases. In this paper, we deal …

Survey Data Analysis

This course was taught between 2018 and 2025. It is replaced by a new course 'sampling and estimation' in 2026-2027, but I am leaving the materials here for archival reasons. This course aims to give students a firm introduction in three broad, and related topics: (1) inference - how do we use small sets of data to produce knowledge about the world around us; (2) survey data analysis, in particular sampling and analyzing complex datasets; (3) survey design - why are surveys designed the way they are? The focus here is on the overall design of a study, not on the design of individual survey questions.