Figure 1. Measures of Central Tendency and Initial Statistics – Based on Raw Scores on Knowledge of Wisconsin (KOW) Test – 2012-2014

From

Project-based Approach to Teaching Standardized Test Construction: A Model for Pre-Service Education Students on How to Standardize a Test

David M. Gordon, James C. Collins, Kelly L. Jewell

American Journal of Educational Research. 2015, 3(12), 1528-1535 doi:10.12691/education-3-12-8