A study was carried on to analyze a data set in order to determine whether evidence can be found to support or refute the unitary factor hypothesis of language proficiency, which asserts that there is a single language dimension or factor underlying different language tests. The subjects were 50 advanced adult learners of English as a second…

A statistical model is presented for analyzing the results of group conversation tests in English, developed in a Finnish university study from 1977 to 1981. The model is illustrated with the findings from the study. In this study, estimates of percentile curves for the number of errors are of greater interest than the mean regression line. It was…

A live demonstration of how a typical set of educational data can be examined using quantitative statistical software was conducted. The topic of tutorial support was chosen. Setting up a hypothetical research scenario, the researcher created 300 cases from random data generation adjusted to correct obvious error. Each case represented a student…