518 – Contributed Oral Poster Presentations: Section on Statistical Education
Classroom Simulation: Distributions of Ties Induced by Rounding Continuous Data
Sponsor: Section on Statistical Education
Keywords: Rounding (IEEE), One-sample tests, R software, Simulation, Statistics Education
Bruce E. Trumbo
California State University, East Bay
Eric A. Suess
California State University, East Bay
Graphical and numerical illustrations of the effects of moderate to severe rounding of normal data on the values of test statistics, actual significance level, and power for one-sample t tests and paired t tests. Goodness-of-fit tests confirm that rounded normal data are not normal. Combinatorial computations, simulations, and graphs are made using R. The level of programming, exposition, and suggested extensions is suitable for upper division and MS level statistics students.