Questions about distributions of random variables
How many observations do I need to make z-scoring (assuming Normality) feasible?
Are there any on-line statistical tables for commonly used distributions?
What is the relationship between the z, t, chi-square and F distributions?
What is the probability of a repetition in a sequence of size k taken from K stimuli?
How do I evaluate Multinomial probabilities of pooled trial frequencies of locations of peaks which can occur in one of K positions in each trial?
How do I fit a Weibull distribution to scores over time using MATLAB and notes on using non-linear least squares?
A note on comparing confidence intervals and statistical significance
How do I obtain the standard deviation from the standard error of the mean (s.e.m.) and how does this and the mean vary with sample size?
What is the variance of the mean of my transformed data and the variance of combinations of means?
What is the relationship between the mean and the median from a sample and how do I compute 95% CIs for the median?
What is an optimal cut-off for the discretization/splitting of a continuous variable and how do we use this in a regression?
A quick approximation for Normally distributed expected order statistics
How do I derive an expected total for a subset of items based on the expected overall total?
How do I compute a difference in errors adjusted for overall number of errors when the errors have different signs?
How do I check Normality assumptions in repeated measures analyses in SPSS?
Testing normality including rules of thumb for skew, kurtosis in SPSS
How do I produce truncated exponential random variables using MATLAB?
How do I obtain parameter estimates for finite Normal mixture distributions using SPSS and BMDP?
How do I find out how many people have a score above a certain value?
How do I compute percentile thresholds for exponential data and use in outlier detection?
How do I obtain the mean of several variables, each minus the same constant? (In SPSS)
How do I compute z-scores in SPSS and what is their relationship to comparing group means?
How do I use cumulative distribution functions to compute p-values in SPSS, EXCEL and R?
How do I adjust for age in comparing survival times in two different groups?
What is the relationship between intercept and slope for scores at two time points?
How do I produce random variables which follow a negative skew distribution?
How do I calculate probabilities involving the multivariate normal distribution?
Simulations sampling from data with replacement (bootstrapping)
Generating multivariate data with a required correlation matrix
How do I obtain the formulae behind statistics outputted by SPSS algorithms?