FAQ/distFAQ - CBU statistics Wiki

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Type the missing letters from: He's no ded, he's jus resing hs eys

Revision 40 as of 2011-02-01 15:53:12

location: FAQ / distFAQ

Questions about distributions of random variables

  1. [:FAQ/cis:A note on comparing confidence intervals and statistical significance]
  2. [:FAQ/poolse:How do I obtain a pooled standard error of the mean?]
  3. [:FAQ/semsd:How do I obtain the standard deviation from the standard error of the mean (s.e.m.)?]
  4. [:FAQ/FVars: What is the variance of the mean of my transformed data and the variance of combinations of means?]
  5. [:FAQ/meanmed:What is the relationship between the mean and the median from a sample?]
  6. [:FAQ/eorder: A quick approximation for Normally distributed expected order statistics]
  7. [:FAQ/subscale: How do I derive an expected total for a subset of items based on the expected overall total?]

  8. [:FAQ/ResidualsNonNormality:Residuals and (Non-)Normality]

  9. [:FAQ/ResidsRepMeas:How do I check Normality assumptions in repeated measures analyses in SPSS?]

  10. [:FAQ/Simon:Testing normality including rules of thumb for skew, kurtosis in SPSS]

  11. [:FAQ/Winsor:Methods of handling outliers.]

  12. [:FAQ/EXponential: How do I produce truncated exponential random variables using MATLAB?]
  13. [:FAQ/mixtures: How do I obtain parameter estimates for finite Normal mixture distributions using SPSS and BMDP?]
  14. [:FAQ/perc: How do I find out how many people have a score above a certain value?]
  15. [:FAQ/percentile: How do I compute percentile thresholds for exponential data and use in outlier detection?]
  16. [:FAQ/rand: How do I generate a random sample in EXCEL?]

  17. [:FAQ/MeanSum:How do I obtain the mean of several variables, each minus the same constant? (In SPSS)]

  18. [:FAQ/zscore:How do I compute z-scores in SPSS?]
  19. [:FAQ/signt:Why does my t-statistic have a negative sign?]
  20. [:FAQ/pvals:How do I use cumulative distribution functions to compute p-values in SPSS, EXCEL and R?]
  21. [:FAQ/surv:How do I adjust for age in comparing survival times in two different groups?]
  22. [:FAQ/t1t2:What is the relationship between intercept and slope for scores at two time points?]
  23. [:FAQ/atan:Arctan functions in EXCEL.]
  24. [:FAQ/cdfs: How do I obtain statistical distributions in MATLAB?]
  25. [:FAQ/gamma:How do I produce random variables which follow a negative skew distribution?]
  26. [:FAQ/multinorm: How do I calculate probabilities involving the multivariate normal distribution?]
  27. [:FAQ/boot: Simulations sampling from data with replacement (bootstrapping)]
  28. [:FAQ/secretS: Bootstrapping without replacement (Secret Santa) in R]
  29. [:FAQ/mvngen: Generating multivariate data with a required correlation matrix]
  30. [:FAQ/formulae: How do I obtain the formulae behind statistics outputted by SPSS algorithms?]