== Questions on categorical data analysis ==

 1. [[FAQ/E|What does a number containing an 'E' signify?]]  

 1. [[FAQ/LogitNPlusHalf|How do I explain adding 0.5 to the cells for the odds ratio, d' (dprime) or logit transform?]]

 1. [[FAQ/OLSvML|Can I use an ordinary linear regression instead of logistic regression to test inference about proportions?]]

 1. [[FAQ/heterogeneity| What is heterogeneity of variance in SPSS Probit and Logit (and Poisson) Regressions?]]

 1. [[FAQ/overdis| What is overdispersion in handling proportions or count data and how do I handle it?]]

 1. [[FAQ/marginhom| How do I perform tests of Marginal Homogeneity between two raters measuring the same items?]]

 1. [[FAQ/Jaeger| When should I use a logit analysis as opposed to an arcsine transformed ANOVA?]] 

 1. [[FAQ/MatchedPairs| How do I do a matched pairs comparison on dichotomous data using covariates in SPSS?]]

 1. [[FAQ/Messy| How do I handle messy data in SPSS to produce duration times from dates and frequencies from strings?]]
 
 1. [[FAQ/ChiSquaredSpss|How do I get SPSS to do a Chi-squared analysis of a two-way frequency table?]]

 1. [[FAQ/onechi|How do I compare a list of observed frequencies with a list of my own expected frequencies?]]

 1. [[FAQ/ChiEqual|Using a chi-square to see if two or more proportions are equal]]

 1. [[FAQ/AdjRes|How do I know which elements contribute to a relationship in a two-way frequency table?]]

 1. [[FAQ/ChiExact| When do I use Fisher's exact test instead of chi-square?]]

 1. [[FAQ/chiwww| How do I obtain Fisher's exact test and chi-square for a two-way table in EXCEL or a 2x2 table on the web?]]

 1. [[FAQ/yates| When do I use the correction for continuity when performing a chi-square analysis on a 2x2 table?]]

 1. [[FAQ/ChiTrend|How do I do a linear trend of proportions in a Chi-squared analysis in SPSS?]] 

 1. [[FAQ/ChiMono|How do I test for a strictly increasing or decreasing series on a set of individuals (not necessarily linear)?]]

 1. [[FAQ/ChiMono2|How do I test for the presence of an unknown ordering across subjects using 2 Dimensional data?]] 
 
 1. [[FAQ/bar|How do I produce a bar chart with empty categories in SPSS?]]
 
 1. [[FAQ/BinomialConfidence|Improved Confidence Limits for a binomial proportion and differences in binomial proportions]]

 1. [[FAQ/Poisson|How do I compare observed numbers correct to those expected by chance in a multi-choice task?]]

 1. [[FAQ/kappa| Additional kappa statistic evaluation in SPSS, benchmarks on size and a measure of inter-rater agreement based on Euclidean distances]]

 1. [[FAQ/lrchi| How do I summarise a fit for a logistic regression model?]]

 1. [[FAQ/looe| How do I compute a leaving-one-out error rate for a logistic regression in SPSS?]]
 
 1. [[FAQ/infmles|Why are the standard errors so large in logistic regression?]]

 1. [[FAQ/logrrsq|How do I choose between different logistic regression models?]]

 1. [[FAQ//mlr|How do I interpret output from a Multinomial logistic regression?]]

 1. [[FAQ/OddsRa| Using an Odds Ratio to summarise a 2x2 frequency table]]

 1. [[FAQ/oddsr|How do I test an odds ratio?]]

 1. [[FAQ/addcounts|How do I combine proportions?]]

 1. [[FAQ/threshold|Which discriminant analysis should I use to obtain thresholds to indicate levels of abnormality using a single variable?]]

 1. [[FAQ/roc|How do I plot and interpret a ROC curve in assessing strength in two group prediction?]]
 
 1. [[FAQ/criteria|Can you recommend any two group discriminant diagnostics?]]

 1. [[FAQ/sigdet|How do I compute signal detection diagnostics?]]

 1. [[FAQ/texts| Can you recommend any statistical textbooks?]]