A key issue of cognitive diagnostic models (CDMs) is the correct identification of Q-matrix which indicates the relationship between attributes and test items. Previous CDMs typically assumed a known Q-matrix provided by domain experts such as those who developed the questions. However, misspecifications of Q-matrix had been discovered in the past…

This article could be of interest to teachers of applied mathematics as well as to people who are interested in applications of linear algebra. We give a comprehensive study of linear systems from an application point of view. Specifically, we give an overview of linear systems and problems that can occur with the computed solution when the…

A simulation study was conducted to identify the best hot-deck variation to impute missing values. The three variations included in the study were the hot-deck random, the hot-deck sequential, and the hot-deck distance. The properties of these methods were investigated under three levels of the proportion of incomplete records and four levels…

This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process, or transmit economically valuable information. This volume consists of input-output tables showing…

This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process, or transmit economically valuable information. Changes in the national labor force are analyzed…

This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process, or transmit economically valuable information. Changes in the national labor force are analyzed…

This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process, or transmit economically valuable information. Changes in the national labor force are analyzed…

Three techniques for assessing the adequacy of correlation matrices for factor analysis were applied to four examples from the literature. The methods compared were: (1) inspection of the off diagonal elements of the anti-image covariance matrix S(to the 2nd) R(to the -1) and S(to the 2nd); (2) the Measure of Sampling Adequacy (M.S.A.), and (3)…

Criticizes a discussion of the reformation of post-TUCE learning equations by John Soper, which were presented in an earlier issue (see EJ 152 358). Claims that the author's manipulations from one equation to another essentially repackaged the same information. (Author/DB)

This report series defines and measures the "information activity" within the national economy. "Information activity" is defined to include those specific industries and occupations whose primary function is to produce, process, or transmit economically valuable information. Changes in the national labor force are analyzed…

This paper concerns situations in which a p x p covariance matrix is a function of an unknown q x 1 parameter vector y-sub-o. Notation is defined in the second section, and some algebraic results used in subsequent sections are given. Section 3 deals with asymptotic properties of generalized least squares (G.L.S.) estimators of y-sub-o. Section 4…

VARIOUS METHODS AVAILABLE FOR A PROJECTION OF OCCUPATIONAL REQUIREMENTS OF A STANDARD METROPOLITAN STATISTICAL AREA (SMSA) ARE REVIEWED, AS WELL AS THE DATA AVAILABLE TO IMPLEMENT THESE APPROACHES. TWO "NAIVE" MODELS ARE RECOMMENDED FOR USE AS BENCH MARKS AGAINST WHICH TO COMPARE MORE SOPHISTICATED APPROACHES--THE "NO CHANGE"…

The third volume of the revised "Higher Education Finance Manual," this guide describes the principles included in presenting financial information in a format showing where money comes from (sources) and where it goes (uses). Potential analytical applications and limitations of the source/use concept are described, and the application…

THIS REPORT PRESENTS THE RESULTS OF A 5-YEAR RESEARCH PROGRAM WHICH ANALYZED MANY OF THE CORRELATES OF PEER ACCEPTANCE-REJECTION IN A SERIES OF STUDIES INVOLVING 37,913 SCHOOL CHILDREN, AGES 9 TO 12 YEARS. PEER ACCEPTANCE-REJECTION WAS INVESTIGATED THROUGH THE USE OF A PEER RATING SCALE AND A TEACHER RATING SCALE. A NUMBER OF METHODOLOGICAL…

This paper is an extended series of appendices to the report "Exploring the T.R.Q.: An Assessment of the Effectiveness of the Teachers' Rating Questionnaire," Report Number 123. It should be most useful to those familiar with multiple regression analysis and factor analysis and wishing a more complex record of the statistical procedures…