Completely Randomized Designs

Overview

Teaching: 0 min
Exercises: 0 min

Questions

• What is a completely randomized design (CRD)?

Objectives

• CRD is the simplest experimental design.

• In CRD, treatments are assigned randomly to experimental units.

• CRD assumes that the experimental units are relatively homogeneous or similar.

• CRD doesn’t remove or account for systematic differences among experimental units.

A single qualitative factor

Analysis of variance (ANOVA)

Equal variances and normality

Inference

A single quantitative factor

Design issues

Key Points

• CRD is a simple design that can be used when experimental are homogeneous.