31. Later his research focused on order statistics and statistical inference based on optimal spacing and goodness-of-fit procedures. 32. Statistical inference uses quantitative or qualitative ( categorical ) data which may be subject to random variations.33. An important consideration when carrying out statistical inference using regression models is how the data were sampled. 34. A theory of statistical inference was developed by repeated-measures design to evaluate their ability to discriminate weights. 35. He is also known for his work in the theory of statistical inference and in multivariate analysis. 36. In those cases, a more heavy-tailed distribution should be assumed and the appropriate robust statistical inference methods applied. 37. Determining whether an ATE estimate is distinguishable from zero ( either positively or negatively ) requires statistical inference . 38. In this setting, the only relevant power pertains to the single quantity that will undergo formal statistical inference . 39. One statistical inference is very clear. 40. In statistical inference , a subset of the population ( a statistical estimated from corresponding characteristics of the sample.