== Questions about distributions of random variables ==

 1. [:FAQ/itt:What is an intention to treat analysis?]

 1. [:FAQ/aster:How do I evaluate a number to a general power in SPSS?]

 1. [:FAQ/cis:A note on comparing confidence intervals and statistical significance]
 
 1. [:FAQ/poolse:How do I obtain a pooled standard error of the mean?]

 1. [:FAQ/semsd:How do I obtain the standard deviation from the standard error of the mean (s.e.m.)?]

 1. [:FAQ/FVars: What is the variance of the mean of my transformed data and the variance of combinations of means?] 

 1. [:FAQ/meanmed:What is the relationship between the mean and the median from a sample?]

 1. [:FAQ/eorder: A quick approximation for Normally distributed expected order statistics]

 1. [:FAQ/subscale: How do I derive an expected total for a subset of items based on the expected overall total?] 

 1. [:FAQ/absdiff: How do I compute a difference in errors adjusted for overall number of errors when the errors have different signs?] 

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

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

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

 1. [:FAQ/~Winsor:Methods of handling outliers.]

 1. [:FAQ/EXponential: How do I produce truncated exponential random variables using MATLAB?]

 1. [:FAQ/mixtures: How do I obtain parameter estimates for finite Normal mixture distributions using SPSS and BMDP?]

 1. [:FAQ/perc: How do I find out how many people have a score above a certain value?]

 1. [:FAQ/percentile: How do I compute percentile thresholds for exponential data and use in outlier detection?]

 1. [:FAQ/rand: How do I generate a random sample in EXCEL?]

 1. [:FAQ/rtest: Some thoughts on testing for randomness]

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

 1. [:FAQ/zscore:How do I compute z-scores in SPSS and what is their relationship to comparing group means?]

 1. [:FAQ/signt:Why does my t-statistic have a negative sign?]

 1. [:FAQ/pvals:How do I use cumulative distribution functions to compute p-values in SPSS, EXCEL and R?]

 1. [:FAQ/surv:How do I adjust for age in comparing survival times in two different groups?]

 1. [:FAQ/t1t2:What is the relationship between intercept and slope for scores at two time points?]

 1. [:FAQ/atan:Arctan functions in EXCEL.]

 1. [:FAQ/cdfs: How do I obtain statistical distributions in MATLAB?]

 1. [:FAQ/gamma:How do I produce random variables which follow a negative skew distribution?]

 1. [:FAQ/multinorm: How do I calculate probabilities involving the multivariate normal distribution?]

 1. [:FAQ/boot: Simulations sampling from data with replacement (bootstrapping)]
  
 1. [:FAQ/secretS: Bootstrapping without replacement (Secret Santa) in R]

 1. [:FAQ/mvngen: Generating multivariate data with a required correlation matrix]

 1. [:FAQ/formulae: How do I obtain the formulae behind statistics outputted by SPSS algorithms?]