看清运费、商品描述、请直接下单,单本不议价,量大从优。标“现货”的当日16点前北京发货,其余的国外发货,一般2-3周周可到货,个别的4-5周,急用的请咨询客服。代购各国外文图书,发票税点3%(下单后联系客服,把税点钱加到订单里面再付款)。孔网买书一定要看清封底和版权页,看好卖家信誉、发货时效。 This book focuses on tools and techniques for building regression models using real-world data and assessing their validity. A key theme throughout the book is that it makes sense to base inferences or conclusions only on valid models. Plots are shown to be an important tool for both building regression models and assessing their validity. We shall see that deciding what to plot and how each plot should be interpreted will be a major challenge. In order to overcome this challenge we shall need to understand the mathematical properties of the fitted regression models and associated diagnostic procedures. As such this will be an area of focus throughout the book. In particular, we shall carefully study the properties of resi- als in order to understand when patterns in residual plots provide direct information about model misspecification and when they do not. The regression output and plots that appear throughout the book have been gen- ated using R. The output from R that appears in this book has been edited in minor ways. On the book web site you will find the R code used in each example in the text.