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Measures of Center
Graphs, Center and Spread
Median Absolute Dev
Mean Absolute Dev
Time Series Plots
Central Limit Theorem
Confidence Intervals (revised 2016)
Graduate Student Projects
Fathom Dynamic Data
Confidence Interval - Simulation
The concept of concept intervals is demonstrated by looking at the 95% confidence intervals for 100 sample means from a given population.
Confidence Interval Simulation - Student Height
Height data for 200 students originates in a case table and is moved to a sampler engine. There are 35 students in each sample and sigma is known. Posted July, 2016.
Simulation data is generated by a random digit generator N(1260, 209). There are 45 students in each sample and sigma is known.
Note that this model assumes the data is normally distributed and does not deal with scores that fall below 600 or above 2400. See the
MATH ACT Dummy Data
page to learn how to adjust for scores that fall outside the range.
Posted July, 2015
Simulation data originates in a sampler engine. The sample size used is 40 numbers and sigma is known. Posted July, 2012; updated July 2013
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