NotesFAQContact Us
Collection
Advanced
Search Tips
Publication Date
In 20250
Since 20240
Since 2021 (last 5 years)0
Since 2016 (last 10 years)0
Since 2006 (last 20 years)2
Descriptor
Computer Simulation2
Equations (Mathematics)2
Mathematical Formulas2
Monte Carlo Methods2
Sample Size2
Statistical Analysis2
Algebra1
Computation1
Effect Size1
Heterogeneous Grouping1
Matrices1
Models1
Reliability1
Research Design1
Researchers1
More ▼
Source
Journal of Experimental…1
Multivariate Behavioral…1
Author
Guo, Jiin-Huarng1
Luh, Wei-Ming1
Wanstrom, Linda1
Publication Type
Journal Articles2
Reports - Evaluative2
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Showing all 2 results Save | Export
Developing the Noncentrality Parameter for Calculating Group Sample Sizes in Heterogeneous Analysis of Variance
Peer reviewed Peer reviewed
Direct linkDirect link
Luh, Wei-Ming; Guo, Jiin-Huarng – Journal of Experimental Education, 2011
Sample size determination is an important issue in planning research. In the context of one-way fixed-effect analysis of variance, the conventional sample size formula cannot be applied for the heterogeneous variance cases. This study discusses the sample size requirement for the Welch test in the one-way fixed-effect analysis of variance with…
Descriptors: Sample Size, Monte Carlo Methods, Statistical Analysis, Heterogeneous Grouping
Sample Sizes for Two-Group Second-Order Latent Growth Curve Models
Peer reviewed Peer reviewed
Direct linkDirect link
Wanstrom, Linda – Multivariate Behavioral Research, 2009
Second-order latent growth curve models (S. C. Duncan & Duncan, 1996; McArdle, 1988) can be used to study group differences in change in latent constructs. We give exact formulas for the covariance matrix of the parameter estimates and an algebraic expression for the estimation of slope differences. Formulas for calculations of the required sample…
Descriptors: Sample Size, Effect Size, Mathematical Formulas, Computation