<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article  PUBLIC '-//OASIS//DTD DocBook XML V4.4//EN'  'http://www.docbook.org/xml/4.4/docbookx.dtd'><article><articleinfo><title>FAQ/cdaFAQ</title><revhistory><revision><revnumber>55</revnumber><date>2019-07-31 09:19:37</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>54</revnumber><date>2015-04-14 15:49:10</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>53</revnumber><date>2014-11-18 12:36:17</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>52</revnumber><date>2014-06-19 10:42:07</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>51</revnumber><date>2014-03-06 11:31:04</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>50</revnumber><date>2014-01-21 14:32:42</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>49</revnumber><date>2014-01-21 14:31:16</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>48</revnumber><date>2014-01-21 14:30:13</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>47</revnumber><date>2013-07-04 13:52:50</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>46</revnumber><date>2013-07-04 13:52:14</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>45</revnumber><date>2013-03-08 10:17:38</date><authorinitials>localhost</authorinitials><revremark>converted to 1.6 markup</revremark></revision><revision><revnumber>44</revnumber><date>2012-07-10 15:00:14</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>43</revnumber><date>2012-07-10 09:44:49</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>42</revnumber><date>2012-07-10 09:39:19</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>41</revnumber><date>2012-05-31 09:40:07</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>40</revnumber><date>2012-05-31 09:27:01</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>39</revnumber><date>2012-01-26 15:31:30</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>38</revnumber><date>2011-06-02 09:53:33</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>37</revnumber><date>2011-02-10 09:55:36</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>36</revnumber><date>2011-02-10 09:49:17</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>35</revnumber><date>2010-08-25 15:44:32</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>34</revnumber><date>2010-08-25 15:43:22</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>33</revnumber><date>2010-08-09 13:24:38</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>32</revnumber><date>2010-08-03 11:18:21</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>31</revnumber><date>2010-03-08 14:29:47</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>30</revnumber><date>2010-01-25 16:55:52</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>29</revnumber><date>2008-11-24 15:47:32</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>28</revnumber><date>2008-11-24 15:46:42</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>27</revnumber><date>2008-11-11 16:22:15</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>26</revnumber><date>2008-11-11 15:59:40</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>25</revnumber><date>2008-10-22 16:10:53</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>24</revnumber><date>2008-10-22 10:33:04</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>23</revnumber><date>2008-10-22 10:30:07</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>22</revnumber><date>2008-10-07 13:26:05</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>21</revnumber><date>2008-10-07 13:23:37</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>20</revnumber><date>2008-08-08 10:41:41</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>19</revnumber><date>2008-07-23 11:33:23</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>18</revnumber><date>2007-07-20 13:31:01</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>17</revnumber><date>2007-07-20 13:30:22</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>16</revnumber><date>2007-07-20 13:24:29</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>15</revnumber><date>2007-07-20 13:21:10</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>14</revnumber><date>2007-07-20 13:11:11</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>13</revnumber><date>2007-07-20 13:10:13</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>12</revnumber><date>2007-04-23 14:44:38</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>11</revnumber><date>2007-04-23 13:46:39</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>10</revnumber><date>2007-03-22 15:36:34</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>9</revnumber><date>2007-03-22 15:34:50</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>8</revnumber><date>2006-11-15 12:31:22</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>7</revnumber><date>2006-11-14 16:58:35</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>6</revnumber><date>2006-09-29 13:21:28</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>5</revnumber><date>2006-09-29 13:00:04</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>4</revnumber><date>2006-09-28 15:59:47</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>3</revnumber><date>2006-09-28 15:25:11</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>2</revnumber><date>2006-09-28 15:24:22</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>1</revnumber><date>2006-09-28 15:24:14</date><authorinitials>PeterWatson</authorinitials></revision></revhistory></articleinfo><section><title>Questions on categorical data analysis</title><orderedlist numeration="arabic"><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/E#">What does a number containing an 'E' signify?</ulink>   </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/LogitNPlusHalf#">How do I explain adding 0.5 to the cells for the odds ratio, d' (dprime) or logit transform?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/OLSvML#">Can I use an ordinary linear regression instead of logistic regression to test inference about proportions?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/heterogeneity#">What is heterogeneity of variance in SPSS Probit and Logit (and Poisson) Regressions?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/overdis#">What is overdispersion in handling proportions or count data and how do I handle it?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/marginhom#">How do I perform tests of Marginal Homogeneity between two raters measuring the same items?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/Jaeger#">When should I use a logit analysis as opposed to an arcsine transformed ANOVA?</ulink>  </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/MatchedPairs#">How do I do a matched pairs comparison on dichotomous data using covariates in SPSS?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/Messy#">How do I handle messy data in SPSS to produce duration times from dates and frequencies from strings?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiSquaredSpss#">How do I get SPSS to do a Chi-squared analysis of a two-way frequency table?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/onechi#">How do I compare a list of observed frequencies with a list of my own expected frequencies?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiEqual#">Using a chi-square to see if two or more proportions are equal</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/AdjRes#">How do I know which elements contribute to a relationship in a two-way frequency table?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiExact#">When do I use Fisher's exact test instead of chi-square?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/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?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/yates#">When do I use the correction for continuity when performing a chi-square analysis on a 2x2 table?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiTrend#">How do I do a linear trend of proportions in a Chi-squared analysis in SPSS?</ulink>  </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiMono#">How do I test for a strictly increasing or decreasing series on a set of individuals (not necessarily linear)?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/ChiMono2#">How do I test for the presence of an unknown ordering across subjects using 2 Dimensional data?</ulink>  </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/bar#">How do I produce a bar chart with empty categories in SPSS?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/BinomialConfidence#">Improved Confidence Limits for a binomial proportion and differences in binomial proportions</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/Poisson#">How do I compare observed numbers correct to those expected by chance in a multi-choice task?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/kappa#">Additional kappa statistic evaluation in SPSS, benchmarks on size and a measure of inter-rater agreement based on Euclidean distances</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/lrchi#">How do I summarise a fit for a logistic regression model?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/looe#">How do I compute a leaving-one-out error rate for a logistic regression in SPSS?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/infmles#">Why are the standard errors so large in logistic regression?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/logrrsq#">How do I choose between different logistic regression models?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ//mlr#">How do I interpret output from a Multinomial logistic regression?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/OddsRa#">Using an Odds Ratio to summarise a 2x2 frequency table</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/oddsr#">How do I test an odds ratio?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/addcounts#">How do I combine proportions?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/threshold#">Which discriminant analysis should I use to obtain thresholds to indicate levels of abnormality using a single variable?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/roc#">How do I plot and interpret a ROC curve in assessing strength in two group prediction?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/criteria#">Can you recommend any two group discriminant diagnostics?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/sigdet#">How do I compute signal detection diagnostics?</ulink> </para></listitem><listitem><para><ulink url="https://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/cdaFAQ/statswiki/FAQ/texts#">Can you recommend any statistical textbooks?</ulink> </para></listitem></orderedlist></section></article>