Diff for "FAQ/cdaFAQ" - CBU statistics Wiki
location: Diff for "FAQ/cdaFAQ"
Differences between revisions 37 and 55 (spanning 18 versions)
⇤ ← Revision 37 as of 2011-02-10 09:55:36 →
Size: 2817
Editor: PeterWatson
Comment:
← Revision 55 as of 2019-07-31 09:19:37 → ⇥
Size: 3735
Editor: PeterWatson
Comment:
Deletions are marked like this. Additions are marked like this.
Line 4: Line 4:
 1. [:FAQ/E:What does a number containing an 'E' signify?]  1. [[FAQ/E|What does a number containing an 'E' signify?]]
Line 6: Line 6:
 1. [:FAQ/LogitNPlusHalf:How do I explain adding 0.5 to the cells for the d' or logit transform?]  1. [[FAQ/LogitNPlusHalf|How do I explain adding 0.5 to the cells for the odds ratio, d' (dprime) or logit transform?]]
Line 8: Line 8:
 1. [:FAQ/heterogeneity: What is heterogeneity of variance in SPSS Probit and Logit procedures?]  1. [[FAQ/OLSvML|Can I use an ordinary linear regression instead of logistic regression to test inference about proportions?]]
Line 10: Line 10:
 1. [:FAQ/MatchedPairs: How do I do a matched pairs comparison on dichotomous data using covariates in SPSS?]  1. [[FAQ/heterogeneity| What is heterogeneity of variance in SPSS Probit and Logit (and Poisson) Regressions?]]
Line 12: Line 12:
 1. [:FAQ/Messy: How do I handle messy data in SPSS to produce duration times from dates and frequencies from strings?]  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?]]
Line 14: Line 22:
 1. [:FAQ/ChiSquaredSpss:How do I get SPSS to do a Chi-squared analysis of a two-way frequency table?]  1. [[FAQ/ChiSquaredSpss|How do I get SPSS to do a Chi-squared analysis of a two-way frequency table?]]
Line 16: Line 24:
 1. [:FAQ/onechi:How do I compare a list of observed frequencies with a list of my own expected frequencies?]  1. [[FAQ/onechi|How do I compare a list of observed frequencies with a list of my own expected frequencies?]]
Line 18: Line 26:
 1. [:FAQ/ChiEqual:Using a chi-square to see if two or more proportions are equal]  1. [[FAQ/ChiEqual|Using a chi-square to see if two or more proportions are equal]]
Line 20: Line 28:
 1. [:FAQ/AdjRes:How do I know which elements contribute to a relationship in a two-way frequency table?]  1. [[FAQ/AdjRes|How do I know which elements contribute to a relationship in a two-way frequency table?]]
Line 22: Line 30:
 1. [:FAQ/ChiExact: When do I use Fisher's exact test instead of chi-square?]  1. [[FAQ/ChiExact| When do I use Fisher's exact test instead of chi-square?]]
Line 24: Line 32:
 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/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?]]
Line 26: Line 34:
 1. [:FAQ/yates: When do I use the correction for continuity when performing a chi-square analysis on a 2x2 table?]  1. [[FAQ/yates| When do I use the correction for continuity when performing a chi-square analysis on a 2x2 table?]]
Line 28: Line 36:
 1. [:FAQ/ChiTrend:How do I do a linear trend of proportions in a Chi-squared analysis in SPSS?]  1. [[FAQ/ChiTrend|How do I do a linear trend of proportions in a Chi-squared analysis in SPSS?]]
Line 30: Line 38:
 1. [:FAQ/ChiMono:How do I test for a strictly increasing or decreasing series on a set of individuals (not necessarily linear)?]  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?]]
Line 32: Line 42:
 1. [:FAQ/bar:How do I produce a bar chart with empty categories in SPSS?]  1. [[FAQ/bar|How do I produce a bar chart with empty categories in SPSS?]]
Line 34: Line 44:
 1. [:FAQ/BinomialConfidence:Improved Confidence Limits for a binomial proportion and differences in binomial proportions]  1. [[FAQ/BinomialConfidence|Improved Confidence Limits for a binomial proportion and differences in binomial proportions]]
Line 36: Line 46:
 1. [:FAQ/Poisson:How do I compare observed numbers correct to those expected by chance in a multi-choice task?]  1. [[FAQ/Poisson|How do I compare observed numbers correct to those expected by chance in a multi-choice task?]]
Line 38: Line 48:
 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/kappa| Additional kappa statistic evaluation in SPSS, benchmarks on size and a measure of inter-rater agreement based on Euclidean distances]]
Line 40: Line 50:
 1. [:FAQ/lrchi: How do I summarise a fit for a logistic regression model?]  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?]]
Line 42: Line 54:
 1. [:FAQ/infmles:Why are the standard errors so large in logistic regression?]  1. [[FAQ/infmles|Why are the standard errors so large in logistic regression?]]
Line 44: Line 56:
 1. [:FAQ/OddsRa: Using an Odds Ratio to summarise a 2x2 frequency table]  1. [[FAQ/logrrsq|How do I choose between different logistic regression models?]]
Line 46: Line 58:
 1. [:FAQ/oddsr:How do I test an odds ratio?]  1. [[FAQ//mlr|How do I interpret output from a Multinomial logistic regression?]]
Line 48: Line 60:
 1. [:FAQ/addcounts:How do I combine proportions?]  1. [[FAQ/OddsRa| Using an Odds Ratio to summarise a 2x2 frequency table]]
Line 50: Line 62:
 1. [:FAQ/threshold:Which discriminant analysis should I use to obtain thresholds to indicate levels of abnormality using a single variable?]  1. [[FAQ/oddsr|How do I test an odds ratio?]]
Line 52: Line 64:
 1. [:FAQ/roc:How do I plot and interpret a ROC curve in assessing strength in two group prediction?]  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?]]
Line 54: Line 70:
 1. [:FAQ/criteria:Can you recommend any two group discriminant diagnostics?]  1. [[FAQ/criteria|Can you recommend any two group discriminant diagnostics?]]
Line 56: Line 72:
 1. [:FAQ/sigdet:How do I compute signal detection diagnostics?]  1. [[FAQ/sigdet|How do I compute signal detection diagnostics?]]
Line 58: Line 74:
 1. [:FAQ/texts: Can you recommend any statistical textbooks?]  1. [[FAQ/texts| Can you recommend any statistical textbooks?]]

Questions on categorical data analysis

  1. What does a number containing an 'E' signify?

  2. How do I explain adding 0.5 to the cells for the odds ratio, d' (dprime) or logit transform?

  3. Can I use an ordinary linear regression instead of logistic regression to test inference about proportions?

  4. What is heterogeneity of variance in SPSS Probit and Logit (and Poisson) Regressions?

  5. What is overdispersion in handling proportions or count data and how do I handle it?

  6. How do I perform tests of Marginal Homogeneity between two raters measuring the same items?

  7. When should I use a logit analysis as opposed to an arcsine transformed ANOVA?

  8. How do I do a matched pairs comparison on dichotomous data using covariates in SPSS?

  9. How do I handle messy data in SPSS to produce duration times from dates and frequencies from strings?

  10. How do I get SPSS to do a Chi-squared analysis of a two-way frequency table?

  11. How do I compare a list of observed frequencies with a list of my own expected frequencies?

  12. Using a chi-square to see if two or more proportions are equal

  13. How do I know which elements contribute to a relationship in a two-way frequency table?

  14. When do I use Fisher's exact test instead of chi-square?

  15. 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?

  16. When do I use the correction for continuity when performing a chi-square analysis on a 2x2 table?

  17. How do I do a linear trend of proportions in a Chi-squared analysis in SPSS?

  18. How do I test for a strictly increasing or decreasing series on a set of individuals (not necessarily linear)?

  19. How do I test for the presence of an unknown ordering across subjects using 2 Dimensional data?

  20. How do I produce a bar chart with empty categories in SPSS?

  21. Improved Confidence Limits for a binomial proportion and differences in binomial proportions

  22. How do I compare observed numbers correct to those expected by chance in a multi-choice task?

  23. Additional kappa statistic evaluation in SPSS, benchmarks on size and a measure of inter-rater agreement based on Euclidean distances

  24. How do I summarise a fit for a logistic regression model?

  25. How do I compute a leaving-one-out error rate for a logistic regression in SPSS?

  26. Why are the standard errors so large in logistic regression?

  27. How do I choose between different logistic regression models?

  28. How do I interpret output from a Multinomial logistic regression?

  29. Using an Odds Ratio to summarise a 2x2 frequency table

  30. How do I test an odds ratio?

  31. How do I combine proportions?

  32. Which discriminant analysis should I use to obtain thresholds to indicate levels of abnormality using a single variable?

  33. How do I plot and interpret a ROC curve in assessing strength in two group prediction?

  34. Can you recommend any two group discriminant diagnostics?

  35. How do I compute signal detection diagnostics?

  36. Can you recommend any statistical textbooks?

None: FAQ/cdaFAQ (last edited 2019-07-31 09:19:37 by PeterWatson)