21. "I don't have any empirical data on what the obnoxious factor is, " he said. 22. Ethnography, as the presentation of empirical data on human terrain, the climate, and the habitat. 23. The lack of confirmation through toxicology cannot necessarily be equated being empirical data of itself. 24. Their research was rooted, in Nuffield style, in a range of social survey empirical data . 25. Using this approach, a researcher inductively develops concepts from empirical data and forms a theory. 26. The empirical data are not quite as polarized. 27. We look deeper _ at the empirical data . 28. I think we have so much empirical data I can't imagine what other data we need. 29. Phenomenological studies of the vortex tube in the past have been useful in presenting empirical data . 30. Recent studies cast doubt on such a causal relation, and so more empirical data is required.
