semi0sane's Page

I read in horror that SPSS cannot test multivariate normality (Field, A. Discovering Statistics using SPSS, 3rd edition, p 603).... I have been using regression to calculate Mahalanobis distances in order to compare these against critical values...and to determine outliers.... is this a reputable solution?Please help!  Thanks x semi0sane x See More

The group aims at helping beginner researchers develop their abilities in terms of research methodology.Our aim is to create in them the scientific spirit, develop their abilities of synthesising, analysing, interpreting data through our contribution

I have a question about using transformed data in an Ancova (and similar methods). I have Two groups (Patient vs. controls) and I have six experimental tasks. I would like to do a mixed factorial Ancova (controlling for age, between factor: Group; within-grouops facto: Task). Two of the task distributions are non-normal and I have successfully SQRT transformed them. My question is, do I have to transform the remaining 4 other Task DV distributions for Ancova comparisions?  My pitiful logic says…See More