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May 28, 2014

Subliminal Messages Case Study

The Subliminal Messages case study and data sets.


Download the case study
Download the data set - 1
Download the data set - 2

Pre-Test and Post-Test:

Determine whether subliminal messages were effective in increasing math test scores, and if so, by how much.  Key ideas: Paired Versus Unpaired Data, Regression to the Mean, Two-Sample t-Test, Placebo Effect, Experiments, Sample Size and Power, and Effect Size (Cohen’s d).

JMP features demonstrated:

Analyze > Distribution, Graph > Graph Builder, Analyze > Fit Y by X

Statistical/graphical tools used:

Histograms, summary statistics, box plots, t-Test and pooled t-Test, normal quantile plot, Wilcoxon Rank Sums test, Cohen's d.


Statistics case studies provided by Dewayne Derryberry of the Math Department at Idaho State University.

Note:  Minor revision May 13, 2015 for JMP 12.