# Inference on One-Way Layout

When the effect of different groups is of our interest, an experimental design of one-way layout (or one factor layout) can be considered. The groups are generally referred as ``treatments'' or ``factor levels.'' For example, a researcher wants to investigate the blood cholesterol of men in three different socioeconomic groups, say level 1, level 2 and level 3. In general the data set of the experiment can be presented in the following table.

Level | Sample data | Sample size |

1 | ||

k |

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