Structured means analysis is a very useful approach for testing hypotheses about population means on latent constructs. In such models, a z test is most commonly used for testing the statistical significance of the relevant parameter estimates or of the differences between parameter estimates, where a z value is computed based on the asymptotic…

The purpose of this quantitative study was to identify the instructional leadership practices that develop a growth mindset in teachers and to determine if the evaluation model will lead to enhanced pedagogical practices. Schools were separated into schools of affluence and poverty. Schools of affluence had less than a 35% free and reduced lunch…

A total of 967 students (males and females) from four secondary schools in Vysocina region of Czechia were interviewed via 24-question Likert-type questionnaire to assess student's environmental awareness and perceptions. The generalized linear models were used to test if (and to what extent) student perceptions related to environment are/or not…

The aim of this research was to establish whether gender and age have an impact on spatial reasoning and its development through the use of 3D modeling. The study was conducted on a sample of 196 children from sixth to ninth grade, of whom 95 represented the experimental group and 101 the control group. The experimental group received 3D modeling…

China and India are the two most populous countries on the planet. To deal with the myriad of challenges and opportunities these countries face will require leadership. The future leaders who will address many of these issues come from institutions of higher education. But, do these students have the requisite leadership training and does it vary…

The objective of the paper is to re-examine the mother-child education achievement hypothesis, by re-examining the effect of mother's education, on math and literacy test scores of children in Kenya. Data come from the classroom Education Research Programme at the African Population and Health Research Centre which was collected between January…

Teacher enthusiasm for reading has considerable influence on students' reading interest and reading ability. The purpose of this study was to better understand the relationship between reading ability and reading interest among adults who plan to become teachers. This study tested whether there is a relationship between reading ability as measured…

This paper proposes an argument framework for the teaching of null hypothesis statistical testing and its application in support of research. Elements of the Toulmin (1958) model of argument are used to illustrate the use of p values and Type I and Type II error rates in support of claims about statistical parameters and subject matter research…

This study shows that the test statistic for Analysis of Covariance (ANCOVA) has a noncentral F-districution with noncentrality parameter equal to zero if and only if the regression planes are homogeneous and/or the vector of overall covariate means is the null vector. The effect of heterogeneous regression slope parameters is to either increase…

Multivariate models are demonstrated to analyze repeated measures profile and growth curve data when univariate or multivariate mixed model assumptions are not tenable. Standard mixed model tests are recovered from certain multivariate hypotheses. The procedures are illustrated using numerical examples. (Author/RC)

Confidence intervals (CIs) for means are frequently advocated as alternatives to null hypothesis significance testing (NHST), for which a common theme in the debate is that conclusions from CIs and NHST should be mutually consistent. The authors examined a class of CIs for which the conclusions are said to be inconsistent with NHST in…

A new method for evaluating model fit that is easy to use and interpret is presented. The new method, which uses a binomial test of the number of hypotheses (paths) in a model that are supported by the data, has heuristic value when considering problems associated with other goodness-of-fit measures. An application of the binomial test as a…

The purpose of this paper is to demonstrate the use of the general linear model (GLM) in problems with repeated measures on a dependent variable. Such problems include pretest-posttest designs, multitrial designs, and groups by trials designs. For each of these designs, a GLM analysis is demonstrated wherein full models are formed and restrictions…

Texts often suggest running preliminary tests for homogeneity of variance prior to running an ANOVA. While it has been known for some time that most of the suggested tests are probably not appropriate, they are still being used. This paper is a review of the literature in terms of the implications involved in running preliminary tests in general…