Method: Pooled T-Test

Methods: Pooled T-Test, Two Sample T-Test, ANOVA,
Topics: Health, Medical,
Datafile Name: Calcium

Does increasing calcium intake reduce blood pressure? Observational studies suggest that there is a link, and that it is strongest in African-American men. Twenty-one African-American men participated in an experiment to test this hypothesis. Ten of the men took a calcium supplement for 12 weeks ...

Methods: Boxplot, Two Sample T-Test, Pooled T-Test, Transformation,
Topics: Psychology,
Datafile Name: Fusion Time

This dataset contains results from an experiment in visual perception using random dot sterograms, such as that shown below. Both images appear to be composed entirely of random dots. However, they are constructed so that a 3D image (of a diamond) will be seen, if the images are viewed with a ste...

Methods: Pooled T-Test, ANOVA, Boxplot,
Topics: Psychology,
Datafile Name: Singers

Each singer in the NY Choral Society in 1979 self-reported his or her height to the nearest inch. Their voice parts in order from highest pitch to lowest pitch are Soprano, Alto, Tenor, Bass. The first two are typically sung by female voices and the last two by male voices.

One can exam...

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