The *Subliminal Messages* case study and data sets.

**Links:**

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.*