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R Statistics Cookbook

You're reading from R Statistics Cookbook

Product type Book

Published in Mar 2019

Publisher Packt

ISBN-13 9781789802566

Pages 448 pages

Edition 1st Edition

Languages

Concepts

Author (1):

Francisco Juretig

Table of Contents (12) Chapters

Preface

Getting Started with R and Statistics

Univariate and Multivariate Tests for Equality of Means

Linear Regression

Bayesian Regression

Nonparametric Methods

Robust Methods

Time Series Analysis

Mixed Effects Models

Predictive Models Using the Caret Package

Bayesian Networks and Hidden Markov Models

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Type I, Type II, and Type III sum of squares

In a one-way ANOVA, the sum of squares can be obtained in a straightforward manner. However, in a two-way ANOVA, things get much more complicated because we have at least three possibilities for computing them. For the following examples, let's assume that we have two factors (A and B), each one with their respective levels.

Type I

The first possibility is the Type I sum of squares, which can be computed by first calculating the sum of squares for factor A, then the sum of squares of B conditional on A, and finally the sum of squares of the interaction (AB) after including the factors, A and B. This is why this is called the sequential sum of squares. Consequently, the order...

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Authors (1)

Francisco Juretig

Francisco Juretig has worked for over a decade in a variety of industries such as retail, gambling and finance deploying data-science solutions. He has written several R packages, and is a frequent contributor to the open source community.

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