Plaque {gpk}

Studying effect of toothpaste on plaque accumulation

Description

Accumulation of plaque on teeth is a major cause of dental ill health. Producers of toothpaste often claim that use of their product will reduce the plaque. Data on three products are to be used to check two things (a) does a particular product reduce plaque? (b) Is reduction achieved the same for all products?

Usage

data(Plaque)

Format

A data frame with 60 observations on the following 3 variables.

Product

The product

Before

Plaque score before treatment

After

Plaque score AFTER treatment

Details

Paired t-test and one-way ANOVA may be attempted for this data set.

Source

http://ces.iisc.ernet.in/hpg/nvjoshi/statspunedatabook/databook.html