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Tool: Quincunx
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Description: A quincunx board starts with 1 pin on the frist row, 2 pins on the second rows, 3 pins on the third row, and so on. Multiple balls are then dropped onto the top pin. As the balls fall to the bottom, they will land into bins which are placed below the last row of pins. When counting the number of balls in each bin, one notices that there are more balls in the center bins than there are in the outer bins. Mathematically, we can notice that this distribution is a normal distribution.
Technology Type: Java Applet 
Authors: Interactive Statistics Educational Package (ISEP)
John Carroll University
Language: English 
Cost: Does not require payment for use

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Courses: Probability & Statistics Normal Distributions, Simulating Experiments, Randomness, Sampling Distributions, Sample Proportions, Sample Means