Summary
Contents
Sooner or later anyone who does statistical analysis runs into problems with missing data in which information for some variables is missing for some cases. Why is this a problem? Because most statistical methods presume that every case has information on all the variables to be included in the analysis. Using numerous examples and practical tips, this book offers a non-technical explanation of the standard methods for missing data (such as listwise or casewise deletion) as well as two newer (and, better) methods, maximum likelihood and multiple imputation. Anyone who has been relying on ad-hoc methods that are statistically inefficient or biased will find this book a welcome and accessible solution to their problems with handling missing data.
Summary and Conclusion
Summary and Conclusion
Among conventional methods for handling missing data, listwise deletion is the least problematic. Although listwise deletion may discard a substantial fraction of the data, there is no reason to expect bias unless the data are not missing completely at random. In addition, the standard errors also ...