Hypothesis testing and normal distribution educational device

Abstract

An educational device and method for teaching statistical concepts such as the normal curve, hypothesis testing for multiple groups and a single sample that includes a box with pegs forming a grid, an entrance zone through which balls can be placed by users through various holes, and a finishing zone through which balls sit in separated chambers on top of a removable stopper track before dropping into a collection bin. Pegs in the grid are offset relative to adjacent rows. The front is transparent. Dropping multiple balls through the center top hole illustrates a normal curve. Dropping multiple balls through different top holes results in multiple approximate normal curves, which illustrates basic principles of hypothesis testing. The use of different colored balls in different top holes further elucidates this concept. The device and educational method by which it is used can be modified to accommodate for different ages and purposes.

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